7
Answer: BSet 1: Percentages (Advanced)
Explanation
PROBLEM
A value increased from 90 to 99. What was the percent increase?
A value increased from 90 to 99. What was the percent increase?
A.
20%
B.✓ Correct
10%
C.
15%
D.
5%
Detailed Explanation
Choice B is the best answer. Change = 99 - 90 = 9. Percent = 9/90 times 100 = 10%
Why others are wrong:
A: 20% is incorrect because it does not satisfy the equation.
C: 15% is incorrect because it does not satisfy the equation.
D: 5% is incorrect because it does not satisfy the equation.