If 4/5 of a number is 12, what is 5/6 of the number?

  1. 4/5
  2. 9
  3. 12.5
  4. 15
  5. 18
Explanation

Answer C

It has two stages. Assume the number is Z.
4/5 x Z = 12, or Z = 12 x 5/4 = 15.
Then find 5/6 of 15 =15 x 5/6 = 5 x 5 /2 = 12.5

Key takeaway: First you convert the word problem into a simple equation with a variable. Then solve simple equation getting the variable alone on one side of the equal sign.

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