The percent increase is 75%.
Step-by-step explanation:
Given,
Initial length of Molly's hair = Old value = 20 inches
Length after three years = New value = 35 inches
Change = New value - Old value
Change = 35 - 20 = +15 inches
The positive sign indicates increase.
Percent increase = [tex]\frac{Change}{Old\ value}*100[/tex]
Percent increase = [tex]\frac{15}{20}*100[/tex]
Percent increase = [tex]\frac{1500}{20}[/tex]
Percent increase = 75%
The percent increase is 75%.
Keywords: percent, subtraction
Learn more about subtraction at:
- brainly.com/question/11280112
- brainly.com/question/11286417
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