15 • n = 10048 15 • n = 4800 n = 320 or 320% Algebraic Method: 48 = n • 15 48 ‚15 = n 3.2 = n change to a percent 320% Solution: 48 is 320% of 15 Ex.3 Eighteen percent of what number is 90?Proportion Method: : 18 90100 n= 18 • n = 100 • 90 18 • n = 9000 n = 500 Algebraic Method: .18 • n = 90 n = 90 ‚ .18 n = 500 Solution: Eighteen percent of 500 is 90.. .25 • 60 = 15 Solution: 25% of 60 is 15 Ex. 2 What percent of 40 is 30? 1. of means multiply is means equal n • 40 = 30 2. Solve for n by dividing. (Similar to what was done in the Proportion Method) n = 30 ‚ 40 .7540 30.00 - 28 0 2 00 - 2 00 0 3. Change the .75 to 75% Solution: 75% of 40 is 30.