Answer:
a. $5
b. $20
c. $1.50
d. $21.50
Step-by-step explanation:
A percent is a portion of 100. If $25 is 100% of the price, and we receive 20% off then we pay 80% of the price. 100%-20%=80%. We find the new price by multiplying 25 by the percent as a decimal. 80% is 0.80.
25(0.80)=$20. The discount is $5 off.
We add tax by using the percent as we did above. Instead of calculating how much we will pay after the discount, we calculate how much the tax percent is in dollars. We take 7.5% and convert to decimal 0.075. We multiply by the price we pay $20.
0.075(20)=$1.50.
We add $1.50 to our total of $20 to pay $21.50.
