2. GED Mathematics Working with percent problems

3. Basic Percent Formula The 100 is a constant Only one of the other three variables could be missing = Percent Whole Part 100

4. Problems missing the Part Formula Examples: What is 5% of 120? What is 20% of 36? During a period of 30 working days, Deborah was late 80% of the time. How many days was she late? Calvin made a down payment of 12% on a used car that cost $2,400. How much was the down payment? = Percent Whole ? 100

5. Problems missing the Part = Percent Whole 100 Part 1 ST Multiply2 ND Divide

6. Problems missing the Part = Percent Whole Part 100 Let’s practice!

7. Problems missing the Percent Formula Examples: 84 is what percent of 75? Jane makes $600 a week. A raise of $24 a week represents what part of her salary? The price of eggs went up from $0.09 to $1.08. The increase represents what percent of the original price? Ann’s weekly salary is $500, but she takes home only $395. The deductions her employer takes out is what percent of her weekly salary? = ? Whole Part 100

8. Problems missing the Percent = Percent Whole Part 100 1 ST Multiply 2 ND Divide

9. Problems missing the Percent = Percent Whole Part 100 Let’s practice!

10. Problems missing the Whole Formula Examples: 60% of what number is 75? Louis got 27 problems right on a math test. If received a score of 90% on the test, how many problems were on the test? There are 78 members at a club meeting. If they represent 65% of the total membership, how many members are in the club = Percent ? Part 100

11. Problems missing the Whole = Percent Whole Part 100 1 ST Multiply 2 ND Divide

12. Problems missing the Whole = Whole PercentPart 100 Let’s practice!