Description: There are several different ways to solve problems involving percentages, decimals, and fractions. Watch as Sal finds the percentage of a whole number. Created by Sal Khan. So one way of thinking about 30%, this literally means 30 per 100. So you could view this as 30/100 times 6 is the same thing as 30% of 6. If you do this multiplication right over here, 30/100, and you could view this times 6/1, this is equal to 180/100.*Teacher Advisor is 100% free.