Question

Suppose Keisha brushed her teeth with her new toothbrush 37 times one month. The next month, she brushed her teeth 48 times. Find the percent increase in the number of times Keisha brushed her teeth. Round your answer to the nearest whole percent.

a) 23%
b) 30%
c) 38%
d) 49%

Answer 1

To find the percent increase in the number of times Keisha brushed her teeth, calculate the difference between the two values and determine the percentage this represents. The percent increase is approximately 30%.

Step-by-step explanation:

To find the percent increase in the number of times Keisha brushed her teeth, we need to calculate the difference between the two values and then find what percent this difference represents of the original value.

Step 1: Calculate the difference between 37 and 48: 48 - 37 = 11.

Step 2: Calculate the percent increase by dividing the difference (11) by the original value (37) and multiplying by 100: (11/37) * 100 ≈ 29.73%.

Step 3: Round the answer to the nearest whole percent: ≈ 30%.

Therefore, the percent increase in the number of times Keisha brushed her teeth is approximately 30%.