2-9 Percents.

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2-9 Percents

What: Variable (x) Is: equals sign (=) Of: Multiply

Problem 2: Finding a Percent using the Percent Equation
What percent of 56 is 42?

What percent of 90 is 54?

Problem 3: Finding a Part
A dress that normally costs \$38.50 is on sale for 30% off. What is the sale price of the shirt?

Problem 3: Finding a Part
What is 72% of 150?

What is 20% of 3?

Problem 4: Finding a Base
125% of what number is 17.5?

30% of what number is 12.5?

Simple Interest Formula
πΌ=πππ‘ πΌ=πΌππ‘ππππ π‘ π=πππππππππ π=πππ‘π ππ  π πππππππ π‘=π‘πππ (ππ π¦ππππ )

Problem 5: Using the Simple Interest Formula
If you invest \$50 at a simple interest rate of 3.5% per year for 3 years, how much interest do you earn?

Problem 5: Using the Simple Interest Formula
You deposit \$125 in a savings account that earns a simple interest rate of 1.75% per year. You earned a total of \$8.75 in interest. For how long was your money in the account?