Final answer:
To find the percent of increase from 12.5 inches to 18.5 inches, the percent increase can be calculated using the formula [(New Value - Old Value)/Old Value] x 100. Substituting the values, the percent increase is 48%.
Step-by-step explanation:
To find the percent of increase from 12.5 inches to 18.5 inches, you need to calculate the difference between the two values and then divide it by the original value. The formula for percent increase is:
Percent Increase = [(New Value - Old Value)/Old Value] x 100
Using this formula, we can substitute the values:
Percent Increase = [(18.5 - 12.5)/12.5] x 100
Simplifying the equation gives:
Percent Increase = [6/12.5] x 100
Percent Increase = 48%