Comparing Quantities

A store is having a 25% discount sale. Sheela has a Rs 50 gift voucher
and wants to use it to buy a board game marked for Rs 320. She is
not sure how to calculate the concession she will get. The sales clerk
has suggested two ways to calculate the amount payable.
– Method 1: Subtract Rs 50 from the price and take 25% off the
resulting price.
– Method 2: Take 25% off the original price and then subtract Rs 50.
a. Do you think both the methods will give the same result? If not,
predict which method will be beneficial for her.
b. For each method, calculate the amount Sheela would have to pay.
Show your work.
c. Which method do you think stores actually use? Why?