To convert the fraction 3/8 into a decimal, you simply need to divide the numerator (3) by the denominator (8). When you perform this division, you get:
3 ÷ 8 = 0.375
So, 3/8 expressed as a decimal is 0.375.
This means that the fraction 3/8 represents three parts out of a total of eight, which is equivalent to a little more than one-third of a whole.