**Finding out what .875 as a fraction is easy. Here's a quick explanation:**

We choose 1000 because there are 3 numbers following the decimal point.

Look for a common divisor: 25 looks like a good place to start.

875/25 = 35

1000/25 = 40

so

875/1000 = 35/40

Can we go further?

How about dividing by 5?

35/5 = 7

40/5 = 8

so 35/40 = 7/8

How's that?