Respuesta :
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:
Both of them are correct. Margarita and Katie do have enough to purchase the books.
Step-by-step 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:
[tex]\frac{20}{100}\times 22.5 = 4.5[/tex]
She subtract that amount from the normal price i.e = 22.5-4.5 = 18
She takes 10% of the discount to selling price:
[tex]\frac{10}{100}\times 18 = 1.8[/tex]
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:
[tex]\frac{80}{100}\times 22.5 = 18[/tex]
Then she computes 110% of the reduced price.
[tex]\frac{110}{100}\times 18 = 19.8[/tex]
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.
