is 1/2 and 3/8 like fractions

No.

1/2 = 4/8

http://www.mathsisfun.com/equivalent_fractions.html

I don' get it

is 1/4 and 3/4 like fractions?

Study the website I posted for you.

Yes, 1/2 and 3/8 are not like fractions because they have different denominators. In order for fractions to be considered like fractions, they need to have the same denominator. To determine if fractions are like or unlike, follow these steps:

1. Identify the denominators of the fractions. The denominator is the number below the fraction line that represents the total number of equal parts into which a whole is divided.

2. Compare the denominators of the fractions. If the denominators are the same, then the fractions are like fractions.

In this case, the denominator of 1/2 is 2, and the denominator of 3/8 is 8. Since the denominators are different, 1/2 and 3/8 are unlike fractions.