Perform the division to the nearest whole number possible. For example, if you are dividing 30 by 20, you would write 1 since 20 fits into 30 one time.
Multiply the number that you wrote in Step 1 times the divisor. In this case you would multiply 1 times 20 to get 20.
Subtract the product from Step 2 from the dividend. In this example, you would subtract 20 from 30 to get 10. This is your remainder.
Write your answer from Sep 1, plus a fraction consisting of the remainder as the numerator (top number) and the divisor as the denominator (bottom number). In this example, you would write 1 10/20.
Reduce the fraction to its simplest form if necessary by dividing the numerator and the denominator by the largest number that will fit into both evenly. This is called the greatest common factor. In this problem, the greatest common factor of 10 and 20 is 10. Therefore you would divide 10 and 20 by 10 to get a final answer of 1 1/2.