Question

Katie and Margarita have $20 each to spend at students Choice bookstore where all students receive a 20% discount they both want to purchase a copy of the same book which normally sells for 22.50 plus 10% sales tax to check if she has enough to purchase the book Katie takes 20% of 22.5 and subtract that amount from the normal price she takes 10% of the discount to selling price and add to back to find the purchase amount. Margarita takes 80% of the the normal purchase price and then computes 110% of the reduced price. is Katie correct? is Margarita correct? do they have enough money to purchase the book?

Answer 1

Katie is correct. You would take 20% of $22.50 (22.5 multiplied by .2). You would get $4.50 off of the book with the discount. So you would subtract 4.5 from 22.5 and get $18. Then you would take 10% of $18 for the sales tax. (18 multiplied by .1). You would get $1.80 towards sales tax. you would then add $1.80 to $18 and get $19.80.

Answer 2

Both of them are correct. Margarita and Katie do have enough to purchase the books.

Explanation:

Consider the provided information.

Katie and Margarita have $20 each to spend at students Choice bookstore where all students receive a 20% discount they both want to purchase a copy of the same book which normally sells for 22.50 plus 10% sales tax to check.

Katie takes 20% of 22.5 and subtract that amount from the normal price she takes 10% of the discount to selling price and add to back to find the purchase amount.

Let us find out whether Katie is correct or not.

She take 20% of 22.5 which is:

`(20)/(100)* 22.5 = 4.5`

She subtract that amount from the normal price i.e = 22.5-4.5 = 18

She takes 10% of the discount to selling price:

`(10)/(100)* 18 = 1.8`

And she add to back to find the purchase amount.

18 + 1.8 = 19.8

Which is the correct calculation.

Thus, Katie is correct.

Margarita takes 80% of the the normal purchase price and then computes 110% of the reduced price.

Let us find out whether Margarita is correct or not.

She take 80% of 22.5 which is:

`(80)/(100)* 22.5 = 18`

Then she computes 110% of the reduced price.

`(110)/(100)* 18 = 19.8`

Which is also the correct calculation.

Thus, Margarita is correct.

Both of them are correct. Margarita and Katie do have enough to purchase the books.