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If 2 over 7 of a ton of concrete covers 7 over 8 of a wall, how many tons of concrete are required to cover the entire wall?

Sagot :

Set up a proportion:

2/7/7/8 = x/1

Multiply 1 to both sides:

(2/7 * 1)/(7/8) = x

(2/7)/(7/8) = x

Flip the 2nd fraction and multiply:

2/7 * 8/7

Multiply the numerators and denominators together:

16/49

So 16/49 tons of concrete are required to cover the entire wall.