Question

a boy was just measured as part of his annual checkup and turned out to be 30 inches tall, which is 25% taller than the last time he was measured. how tall was the boy last time?
inches
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Explanation:

Step1: Define the variable

Let \( x \) be the boy's height last time.

Step2: Set up the equation

Since the current height (30 inches) is 25% taller than the last time, the current height is \( x + 0.25x = 1.25x \). So we have the equation \( 1.25x = 30 \).

Step3: Solve for \( x \)

To find \( x \), we divide both sides of the equation by 1.25: \( x=\frac{30}{1.25} = 24 \).

Answer:

24