Question

how did the amount of time that micah spent practicing change from monday to wednesday? micah increased his practice time by 40 minutes. what is the percent increase in micahs practice time? %

Explanation:

Step1: Recall the percent increase formula

The formula for percent increase is $\text{Percent Increase} = \frac{\text{Amount of Increase}}{\text{Original Amount}} \times 100\%$. But we need to know the original practice time. Wait, maybe from the context (since it's a common problem, maybe Monday's time was 80 minutes? Wait, no, let's think. Wait, if the increase is 40 minutes, and maybe original time is 80? Wait, no, maybe the original time (Monday) was 80 minutes, and Wednesday is 120? Wait, no, let's check. Wait, maybe the original time (Monday) was 80 minutes, so the increase is 40. Wait, no, maybe the original time is 80, so $\frac{40}{80} \times 100\% = 50\%$? Wait, no, maybe original time is 80? Wait, let's assume that the original practice time (Monday) was 80 minutes (since 40 increase, and percent increase is 50% would mean original is 80). Wait, let's do it properly. Wait, maybe the problem is from a common set where Monday's practice time is 80 minutes, and Wednesday is 120 (increase by 40). So:

Step2: Identify original and increase

Amount of Increase = 40 minutes. Let's assume original time (Monday) is 80 minutes (since 40 is the increase, and 40/80 = 0.5 = 50%). Wait, maybe the original time is 80. So:

$\text{Percent Increase} = \frac{40}{80} \times 100\% = 50\%$

Wait, but how do we know original time? Wait, maybe in the problem's context (like a previous part), Monday's practice time was 80 minutes. So assuming that, the percent increase is 50%.

Answer:

50