Multiplying both by the same number does not change their relationship, but it can help you answer your question.

1/3*24 = 8

3/8*24 = 9

You can also divide them out to convert to decimal fractions. Two or three decimal digits is enough to tell which is larger.

1/3 = .333...

3/8 = .375

3/8 is larger

1/3*24 = 8

3/8*24 = 9

You can also divide them out to convert to decimal fractions. Two or three decimal digits is enough to tell which is larger.

1/3 = .333...

3/8 = .375

3/8 is larger