How do you do 8 over 20 minus 2 over 5?

Answer 1

First of all you need to line them up.

8/20 - 2/5

Next you need to find a common denominator.

20 is a common denominator between the 2.

Then you change both denominators to the common one.

8/20=8/20, 2/5 x 4/4= 8/20

{Since 5x4=20, you have to do that on both sides to get the common denominator.}

Then you subtract

8/20 - 8/20 = 0.

So the answer is 0