Question

Serena bought 3/4 pound of cheese. She used 2/3 of the cheese for sandwiches.

How much cheese did Serena use for sandwiches?

a- 1/4
b- 1/3
c- 1/2
d-5/7

Answer 1

Find a common denominator first.
In this case the common factor of 3 and 4 is 12.
Multiply (3/4) by 3/3
and (-2/3) by 4/4
9/12 - 8/12
= 1/12

Answer 2

2/3 of 3/4 ("of " means multiply)
2/3 * 3/4 = 6/12 = 1/2