To find the decimal representation of 7/2, we simply just have to divide the numerator (7) by the denominator (2). This will give us the same value as 7/2, but written as a decimal instead of as an improper fraction.
7/2 = 3.5
Therefore, your answer is 3.5. This is verified by our knowledge that if we convert 7/2 to a mixed number, we get 3 1/2, which is equivalent to 3.5 as well.
The question is asking for 1/3 of Molly’s length, which is 20 inches. The word of in this context indicates multiplication, which means you should multiply 20 by 1/3. 1/3 x 20 = 6.666666 (repeating) or 6.7 (rounded) Therefore, Molly is 6.7 inches tall.