Question

You are buying two bags of potato chips at the grocery store. You have a manufacturer’s coupon for $0.50 off and the store is offering 50% off if you buy two bags. The discounts are stackable. How do you compute your final cost?

Answer 1

how much is the original price?

Answer 2

@JustSaiyan

Answer 3

@bradow44

Let's say (chips) = the original price of 1 bag of chips

then (chips)+(chips) = the price of 2 bags of chips

Answer 4

The store is offering 50% off
50% = 0.5
then the "off" means that 100% - 50% = the price we pay
but that would still be 50% so it wouldn't really matter in this specific question
(but you should keep that in mind for future questions)

so we get
( (chips)+(chips) ) * 0.5

Answer 5

But we also have a $0.50 coupon

so we should subtract 0.50 from what we have gotten so far

that would be
( ( (chips)+(chips) ) * 0.5 ) - 0.50


that should be all of it
you could think of (chips)+(chips) as 2*(chips), which is the same thing
because multiplication is just repeated addition

If you are confused at any part, or would like a different explanation, feel free to take me with @Angle
Have a nice day ^_^