Your answer was wrong according to my study guide answer key. I need to learn how to do this without a calculator. I don't want a soft brain.

Good for you! There is no better way to learn than to just understand the reasoning.

You can do it the long way, one step at a time:

1/8 = 0.125 and 5/8 = 0.625

0.125 / 0.625 = 0.2

0.2 x 100 = 20% (per cent just means per 100, nothing fancier than that.)

You can do it the long way, one step at a time:

1/8 = 0.125 and 5/8 = 0.625

0.125 / 0.625 = 0.2

0.2 x 100 = 20% (per cent just means per 100, nothing fancier than that.)

Multiply the two figures and then click on percentage on you calculator.You will get the answer, In the case of above example the answer would be 0.05.