To turn a decimal into a fraction, first notice that the number to the right of the decimal place is 375. The 3 represents the tens, the 7 represents the hundreds, and the 5 represents the thousands so we can put 375/1000.
Notice that our fraction is not in lowest terms. To turn the fraction into lowest terms, we need to find the greatest common factor. When looking at 375, you can see that 125 will go into 375 three times and 125 will go into 1,000 eight times. Now, we have our simplified fraction which is 3/8.