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?
Mathematics
Kashi7
Question
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?
1 Answer

1. User Answers iGreen
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.