by how much is 21 greater than product of 3 1/5 and 5 3/4.

Question

I think we will first get the product before divividing by 21

Answer 1

Problem: by how much is 21 greater than product of 3 1/5 and 5 3/4.
I think we will first get the product before divividing by 21

You are correct about getting the product first.

3 1/5 * 5 3/4 = 16/5 * 23/4 = (16 * 23) / (5 * 4)
(16 * 23) / (5 * 4) = 368/20 = 18.4

However, you DO NOT divide by 21. The problem asks how much
is 21 greater than the product. That means you SUBTRACT the
product FROM 21.

21 - 18.4 = 2.6

Answer: 21 is 2.6 greater than the product of 3 1/5 and 5 3/4.