% Change is defined as (Post value − Pre value) / Pre value × 100. If Pre is 40 and Post is 50, what is the % Change?

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Multiple Choice

% Change is defined as (Post value − Pre value) / Pre value × 100. If Pre is 40 and Post is 50, what is the % Change?

Percent change measures how big a change is relative to where you started, using the starting value in the denominator. It’s calculated as (Post − Pre) ÷ Pre × 100. Here, Pre is 40 and Post is 50. The change is 50 − 40 = 10. Divide by the starting value: 10 ÷ 40 = 0.25. Multiply by 100 to get 25%. So the percent change is 25%. Using the ending value as the base would give 10 ÷ 50 = 20%, which isn’t how this formula is defined.

Percent change measures how big a change is relative to where you started, using the starting value in the denominator. It’s calculated as (Post − Pre) ÷ Pre × 100.

Here, Pre is 40 and Post is 50. The change is 50 − 40 = 10. Divide by the starting value: 10 ÷ 40 = 0.25. Multiply by 100 to get 25%.

So the percent change is 25%. Using the ending value as the base would give 10 ÷ 50 = 20%, which isn’t how this formula is defined.

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