A construction crew has just finished building a road. The road is 9 kilometers long. If the crew worked for 4 2/7 days, how many kilometers of road did they finish each day

Question

How many kilometers did the construction build each day if they worked for 4 2/7 days

Answer 1

You want to get the answer in kilometers/day. So let us first convert 4 2/7 days to the fraction 30/7 days. That is accomplished by (4x7) + 2 over 7. Then we have 9 kilometers divided by 30/7. This can be written as

9 kilometers ÷ 30/7 days, which is the same as (9 x 7)/30 which is = 63/30 = 2.1 kilometers/1 day. Maybe someone else can explain it better.