Final answer:
To find the percent of increase from 12.5 inches to 18.5 inches, use the formula: Percent Increase = [(New Value - Original Value) / Original Value] * 100. Plug in the values and calculate to find the percent increase, which is 48% (rounded to the nearest tenth).
Step-by-step explanation:
To find the percent of increase from 12.5 inches to 18.5 inches, use the formula:
Percent Increase = [(New Value - Original Value) / Original Value] * 100.
Plug in the values:
Percent Increase = [(18.5 - 12.5) / 12.5] * 100.
Simplify:
Percent Increase = [6 / 12.5] * 100.
Calculate:
Percent Increase = 0.48 * 100
= 48% (rounded to the nearest tenth).