To compare, you must make the denominator common. In this case you find the great common factor which is 12. So you make 4/6 denominator equal to 12. So what can 6 times to, to equal to 12? (6x_=12)? 2. So you times the denominator by 2 and the numerator by 2. And you’ll get: 8/12. Now compare: 4/12 < 8/12 To make it easy to understand: (4 slices out of 12 is less than 8 slices out of 12).