Question

Torrid had $20 to but a birthday present for her dad. She decided to buy a DVD for $18. The sales tax is 7%. Does she have enough money? Explain your reasoning.

Please Show Work Too

Answer 1

You could find the final cost of the DVD with tax by multi. $20 by 1.07:

1.07($20) = $21.40.  Unfortunately, Torrid does not have enough $ to buy this DVD.

Answer 2

You need to calculate 7% of $18 and add to $18.

7% of $18 =

= 7% * $18

= 0.07 * $18

= $1.26

The sales tax is $1.26

$18 + $1.26 = $19.26

Since $19.26 is less than $20, she has enough money.