Question

Where is the mistake in the following problem?

1) 3/12

2)9/12

3)3/4

4)1/3

Answer 1

1) 3/12

Because 1/3 would have changed to 4/12,
1x4= 4
3x4=12
You need to multiply them by the same number and 1) was multiplied by three on the numerator and four on the denominator.