Solve the percent change problem using the percent change formula. List the information given by each situation. Show the substitution into the percent change formula equation. State the final result in complete sentence using the appropriate unit.

Question

Anselmo gave his waiter a 17% tip on his $25 breakfast check. How much of a tip did Anselmo leave his waiter?
Using the information give, choose the best answer.

Substitution and solve = ________

Answer 1

Information given: 17% tip on a $25 breakfast check

Percent change formula: Percent Change = (New Value - Old Value) / Old Value * 100

Substitute:
New Value = $25 + 0.17($25) = $25 + $4.25 = $29.25
Old Value = $25

Percent Change = ($29.25 - $25) / $25 * 100 = $4.25 / $25 * 100 ≈ 17%

After solving, the amount of tip Anselmo left for his waiter is $4.25.