Question

Mary bought a shirt on sale for $15.00.The sales tax was 10%.Mary paid with a $20 bill,what is her change?

Answer 1

$3.5

Explanation:

15.00 times 10 divided by 100 equals $1.5 which is the sales tax. $15 plus $1.5 equals $16.5. $20 minus $16.5 equals to $3.5.

Answer 2

$3.5

Explanation:

Adding 10% to a number is the same as multiplying it by 1.1

To find $15 with 10% sales tax, the equation is 15 * 1.1 = 16.5.

Mary's change will be the $20 bill minus the price of the item, which is the equation 20 - 16.5 = 3.5.