Question

-Ready

Answer 1

Answer:

80%

Step-by-step explanation:

Please consider the complete question:

Micah is preparing for a piano recital. He practices for 50 minutes on Monday and  90 minutes on Wednesday. By how much did she increase the time she practiced each day?

We will use percent change formula to solve our given problem.

$\text{Percent change}=\frac{\text{Final value}-\text{Initial value}}{\text{Initial value}}\times 100\%$

Upon substituting our given values, we will get:

$\text{Percent change}=\frac{90-50}{50}\times 100\%$

$\text{Percent change}=\frac{40}{1}\times 2\%$

$\text{Percent change}=80\%$

Therefore, Micah had increased the time by 80%.