In this problem, you add 21 and 29. That results in 50 and you can either: 1. Divide 29 by 50 and multiply 100. 29/50= .58 * 100= 58% or 2. Since percentage is based on 100 and the denominator is 50, multiply the top and bottom by 2 like so. 29 x 2 = 58 --- -- ----- so that makes your percentage 58. 50 x 2 = 100