Question

When Ricardo was 9 years old, he was 56

inches tall. Ricardo is now 12 years old and
he is 62 inches tall. Find the percent of
increase in Ricardo's height to the nearest
centh.

Answer 1

10.7%

Explanation:

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%