To change any number to a percentage, multiply it by 100%. If you have trouble with the mixed number, you may find it easier to change it to an improper fraction first. Example 3 5/8 = (3 5/8)*100% = 300% + (500/8)% = 300% + 62 1/2% = 362 1/2% 3 5/8 = (29/8)*100% = (2900/8)% = 362 1/2%