Question

In Miami, the number of highway accidents increased by 20% over a four year period. How many accidents were there in 2013 if there were 5,120 in 2009?

Answer 1

6144

Explanation:

Answer 2

There were 6144 accidents.

Explanation:
The number of accidents increased by 20% over a four-year period.

We know there were 5120 accidents in 2009; to find the number four years later, in 2013, we take 100%+20%, or 120%, of this number:
5120*1.2=6144.