When Ricardo was 9 years old, he was 56 inches tall. Ricardo is now 12 years old and he is 62 inches tall. What is the percent change rounded to the nearest tenths?

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Answer 1 · 2018-02-01T13:51:28

See a solution process below:

The formula for calculating the percent change in a value between two points in time is:

#p = (N - O)/O * 100#

Where:

#p# is the percent change - what we are solving for in this problem.

#N# is the New Value - 62 inches in this problem.

#O# is the Old Value - 56 inches in this problem.

Substituting and solving for #p# gives:

#p = (62 - 56)/56 * 100#

#p = 6/56 * 100#

#p = 600/56#

#p = 10.7# rounded to the nearest tenth.

Ricardo gres 10.7%