Scribepost for percent

4. How many hundred grids are needed to show each of the following percents?
a) 101% We need 2 grids because 1 grid is 100% + 1 more grid that's 1%=101%









b) 589%=6 grids A grid is a 100% and we need six of them to cover 589% We need 5 grids that's completely shaded and 1 grid that's 89% shaded.
















c) 1450% 100%=1grid
1000%=10 grids
1400%=14 grids
1450%=15 grids

9. Copy and complete the following table.















15. A forester recorded the following data on tree types.

a) What is the total number of trees recorded? 1814 b) What percent of the total does each tree species represent?

Scribepost

Today I had to do three questions on what we did recently in math class for scribepost today.

4. How many grids do each percent needs

a) 101%

We all know that 100% is one grid.

100 = 1 grid

101% is one percent higher than one hundred percent but we can not just put another square unit on to the hundred grid (same thing with alot of numbers) so we have to put another one hundred grid to cover that extra one percent.
X 101% = 1 grid (do not do this)
101% = 2 grids (putting another grid to cover the extra one percent is correct)


b) 589%

Again with the stuff above, 100% is one grid and why we can not increase the number of units in a grid. In other words we need to round up to the nearest hundred(always) and never round down. 589 rounded up is 600. Which means we need six 100 grids for this question. Then we just muliply one grid by 600 to complete the answer.

589 rounds up to the nearest 100 = 600
100 = 1 grid
1 x 600 = 600
600 = 6 grids

c) 1450%

Same thing with the other questions, we need to round up the number to the nearest hundred.

1450 rounds up to 1500
100% = 1 grid
1500 x 1 = 1500
1500 = 15 grids
10. A coach asked to give 110%.

a) Just find out the value of 110% in a fraction and in a decimal.

I first convent it into a simple fraction. Since fractions can be out of anything, I put the 110% on top because it is the value out of something. Then I put 100 on the bottom because percents are out of 100. Then from there, I have to simplify the fraction until it is in its most basic form. Dividing it by two is a very common way to simplify a number.

110 = 110/100
110/100 divided by 2 = 55/50

Fractions cannot have a decimal in it, so I had to use an alternative that if they have a relationship with each other we can divide it by the common muliple (relationship) to get a more simplified fraction. For this, they are both divisible by five so we can use it as the relationship. Then I can just divide the fraction by five.

55/50 divided by 5 = 11/10
The value is 11/10.
Now the fraction is in its most basic form (we cannot divide the fraction into another proper fraction; otherwise it is the answer). Now I have to find the value of 110% in a decimal.

Decimals are out of one and percents are out of one hundred. Do not worry, one and one hundred have a common mulitple between each other (by the way, its 100).

1 = 100%
110% divided by 100 = 1.1
110% = 1.1
The value is 1.1

b) What does the statement mean to you?

To me, the statement "Means give it all you got!!!" or "Give it your best!". In a more simple way, try your hardest. Now onto the last and final question I have to do for scribepost today.

14. Julia borrowed $100 from her brother. Julia's brother put a 5.5% interest for every month Julia did not pay him back (seriously, who does that!?). One month later, Julia paid her brother back. How much interest did Julia pay?

Well I solve questions like this in my way (simple, fast, shows you have done your work). I first find the percents I need and add them together to get the answer. There are other ways to get the answer, so you can do it your way when solving questions like these. I first find the five percent. Then I am going to find the half of a percent. After, I am just going to add them together to get the answer.I will not use ratio tables for this question, besides it saves alot of room. :)

$100 divided by 20 = $5
100% divied by 20 = 5%
$5 = 5%
Twenty mulipled by five equals one hundred. That is why I put twenty as the common muliple which I used to divide the number. Then I got the five percent I needed. Now I just have to find one half of a percent.

Both the 100% and $100 is the same so the results will be the same. I then am going to divide 100 by 100 to get one. After, I am going to divide it again by 2 to get one half of a percent.

$100 divided by 100 = $1
$1 divided by 2 = $0.50
$0.50 = 0.5%

Now I am going to add them up together to find the answer of this question.

$5 + $0.50 = $5.50

Julia paid an interest of $5.50

Thank you for reading my scribepost for today and farewell!!!!!

Bruce's 3 Q's on Percents

Hello,
Today Mr Harbeck told us to pick any percent questions and answer them, so here we go.

Pg 148

2)How can you calculate a cost of an item with tax just in one step.
In my opinion I would multiply the original number by a single percent greater than 100.
e.g. 111% of 100=1.11 x 100
=111
Pg 146

2) gst is 5%, pst is 7% and you purchase an item for $100.

a) How would you represent the 5% and 7% on a 100 grid.
Since it's out of 100 I would just color 5 squares representing 5% and 7 squares representing 7%.

b)How much is the gst and the pst.
Since it's out of 100 the gst would be .07 cents and the pst would be .05cents. The reason I thought this is because 7% and 5% wouldn't be $7 and $5 worth of tax so that's why I turned it into cents.

c)How much tax does a person pay all together.
A person would have to pay 12% worth of tax all together.

5)
a)Describe 2 ways you could calculate the total tax of an item.
First way is by using a ratio table. The second way is by using the formula where you multiply the original number by a single percent greater than 100.

b)Which method do you prefer to use? Explain.
I prefer the ratio table method because, it's the method I'm most used to.

I chose to do this question because my computer wasn't showing all the questions I had chosen.

textbook questions 3 on page 142

HEY


Use mental math to determine each of the following.

300% of 2000

you have to fid 100% 100%=2000



to get 300% you multiply by 3 so you have to multiply 2000 by 3

100% multiplied by 3 = 300%

2000 multiplied by 3 =6000



so 300% of 2000 is 6000

Percents foldable 4.3, jan.26/10, tamika816

This goes in the percents foldable under 4.3 percent of a number.

Part A

Q1) Explain how you could use mental math to find each of the following:
a. 300% of 40. b. 0.5% of 120. c. 10.5% of 80.

A1a)

I use a ratio table to get my answer usually. In this one I went straight to multiplying 100% to 300% because it is an easy number to find. Then i multiply 40 by 3.

1b)

You can make the number a decimal by dividing it by 100. Then i multiplied the percent by 10, so its an easier number to work with. I took 1.2 then multiplied it by 5 which makes 6. And last divided it back down by 10.

1c)

I took a long way, but if you use numbers you work good with then it still works. I made 10% by dividing 100 by 10. Then I made 0.5% by dividing 1% by 2 and added 10% and 0.5% together to make 10.5%.

Q2) Describe 2 ways to find 6% of 129.

A)

one way is that you can go from 100 to 1(on a ratio table). Then multiply 1 by 5 to get 5 and add the 5% and 1% together to get 6%.
--Or you can divide 120 by 100% to get 1.2. Then multiply 1.2 with 6% which gives you 7.2.

Part B

Mr. Harbeck gave us this extra question.

Q3) How do you find 10%, 1%, 25%, 5%, 150%, and 0.5%?

A)
- 10%= 100/10.
- 1%= 100/100.
- 25%= 100/4 OR 100/2=50, then 50/2=25.
- 5%= 100/10=10, then 10/2=5.
- 150%= 100/2=50, then 50+100=150.
- 0.5%= 100/100=1, then 1/2=0.5.

Thanx for reading!!!!
Pleaze leave comments!!!! =) =D =]

Althea's Scribepost, January 13, 2010

Today I'm assigned to do question 4, 8, 9, and 16.
First, I'll do question 4

Question no. 8
Question no. 9

* I'm not sure with my answer, that's why I looked at the back of the book, and the book mentioned that the answer is:

Question no. 16


Thanks for reading..
Please leave a comment..