Question

The number of kids in a robotics club grew from 23 to 31. What was the percent increase in the number of kids in the club? Round your answer to the nearest whole percent.

Answer 1

Answer: $35\%$

Step-by-step explanation:

For this exercise you need to use the following formula:

$\%increase=\frac{New\ value-Old\ value}{Old\ value}*100$

According to the exercise, the number of kids in a robotics club grew from 23 to 31; then you can identify that:

$New\ value=31\\\\Old\ value=23$

Knowing these values, you can substitute them into the equation and then evaluate, in order to find the percent increase in the number of kids in the club. Then:

$\%increase=\frac{31-23}{23}*100\\\\\%increase=34.78\%$

Rounding it to the nearest whole percent:

$\%increase=35\%$