Question

Last year, Sandro bought a book for $20. This year the same book cost $25. What was the percent of change in the cost of the book?

A) 20% increase
B) 25% increase
C) 5% increase
D) 20% decrease

Answer 1

The percent of change in the cost of the book is a 5% increase.

Step-by-step explanation:

The percent of change in the cost of the book can be calculated using the formula:

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

Substituting the given values into the formula:

Percent Change = (25 - 20) / 20 * 100 = 5%

Therefore, the percent of change in the cost of the book is a 5% increase (option C).