SOLUTION: Lindsey can travel 400 miles on 20 gallons of gas. How many miles can she travel on 15 gallons of gas? ____ miles

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Question 995942: Lindsey can travel 400 miles on 20 gallons of gas. How many miles can she travel on 15 gallons of gas?
____ miles

Found 2 solutions by fractalier, josgarithmetic:
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
Set up a proportion...
400 is to 20 as x is to 15...or
400/20 = x/15
We can cross-multiply and get
20x = 6000
x = 300 miles

Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
d, how many miles;
400%2F20=d%2F15