Answer and explanation

Correct answer: D. 3 : 4

Answer: 3 : 4. Why not the others: 9 : 12 and 6 : 8 are equivalent but can still be divided further; 2 : 3 is a different ratio.
  1. Step 1: The highest common factor of 18 and 24 is 6.
  2. Step 2: Divide both by 6 to get 3 : 4.

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