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josieramezcua1 josieramezcua1
  • 21-01-2016
  • Mathematics
Answered

Charles finished 7 laps around the track. This is 20% of the number of laps he has to do. How many laps must he do?

Verified Answer :

tpp034
tpp034 tpp034
  • 21-01-2016

To solve this problem, you have to use a proportion:
7/20 = x/100

After setting up the proportion, you have to cross multiply:
20x=700

Now, solve the equation by dividing by 20 on both sides:

x=35

So Charles has 35 laps left.

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