Which is more 3 fourths of 7 twelves?

Answer 1

3/4 and 7/12 are both over half (which would be 2/4 and 6/12). But 3/4 of 12 is 9 (multiply 3 * 4), so you can see without ever even finding the decimal equivalents, changing denominators, etc. that 3/4 is greater than 7/12.

Incidentally, 12 is a multiple of 4, so it is easy to change the denominators in this one, so you get 9/12 > 7/12.