Percent Problems Solving Simple Percent Problems

Using the Percent Proportion Simple percent problems have three parts. 1.The percentage – easy to spot – has % 2.The base – always follows the word “of” 3.The amount – the third number

Find 5% of 20 Identify the three parts. 1.The percentage – 5% 2.The base – of 20 3.The amount – what we are trying to find – x

The Percent Proportion This proportion always works with simple percent problems.

Find 5% of 20 1.The percentage – 5% 2.The base – of 20 3.The amount – what we are trying to find – x

Find 5% of 20 Cross-multiply: 100 x = 100 Divide: x = 1 5% of 20 is 1

What percent of 40 is 15? 1.The percentage – what we are trying to find – x 2.The base – of 40 3.The amount – 15

What percent of 40 is 15? Cross-multiply: 40 x = 1500 Divide: x = is 37.5% of 40

20 is 40% of what number? 1.The percentage – 40% 2.The base – what we are trying to find - of what - x 3.The amount – 20

20 is 40% of what number? Cross-multiply: 40 x = 2000 Divide: x = is 40% of 50

Using the Percent Proportion The percentage – easy to spot – has % The base – always follows the word “of” The amount – the third number To solve: Cross-multiply and divide