A pine tree measured 40 1/2 feet tall. Over the next 7 1/2 years, it grew to height of 57 feet. What was the percent change?

40 1/2 feet tall

over 7 1/2 years it grew to 57 feet

the percent change overall is 57/40.5 = 1.407 or 40.7% increase and per year you divide it by 7.5 and you get a percentage change of 5.432% per year

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