In class we learned that:
Discount: What you save.
Sale Price: What you pay.
For this problem I tried to use a ratio table:
First I fould 1% then I used that to find the
The total cost of the backpack would be $38.85
= $ 38.85
100%-40%=60%. So I found 60% out of 35. And then I found the GST and the PST, from that.
Sorry if Im wrong, if you see any mistakes or something that's missing please comment.