1. Do Now Solve each proportion by using cross products: 10/12 = x/18 6/8 = 15/x 4/8 = x/30

2. Review The ratio of cocoa to milk in Mrs. Ruderman’s hot chocolate recipe is 3:5. The ratio of cocoa to milk in Ms. Eardley’s hot chocolate recipe is 7:9. Which hot chocolate will taste the most chocolaty?

3. Homework Review

4. Complete Sam’s Club Project This needs to be completed TODAY!!! When finished…

5. 7 th Grade Math Grace Wilday Junior High School “Raise the Praise”

6. Objective TLWBAT solve problems dealing with percents by using the “is over of” rule in conjunction with cross multiplying to successfully solve 20 out of 25 problems. NJCCCS 4.1.7.A.3 Common Core 7.RP.A.3

7. The human body is made up mostly of water. In fact, about 67% of a person’s total (100%) body weight is water. If Cameron weighs 90 pounds, about how much of his weight is water? Recall that a percent is a part of 100. Since you want to know the part of Cameron’s body that is water, you can set up and solve a proportion to find the answer. Part 67 = xPart 100 90 Whole

8. Find the percent of each number. Using Proportions to Find Percents of Numbers 30% of 50 30 100 = x 50 30 · 50 = 100 · x 1,500 = 100x 1,500 100 = 100x 15 = x 30% of 50 is 15. Write a proportion. Set the cross products equal. Multiply. Divide each side by 100 to isolate the variable.

9. “Is over of” Rule What percent of 90 is 45?

10. “Is over of” Rule 12 is 8% of what number?

11. “Is over of” Rule What percent of 75 is 105?

12. “Is over of” Rule What is 65% of 80?

13. “Is over of” Rule 20 is 40% of what number?

14. “Is over of” Rule 80% of what number is 68?

15. “Is over of” Rule $12.00 is 25% of what amount of money?

16. “Is over of” Rule What is 30% of $40.00?

17. How much am I spending on the PS4? How much tax is 7% of $400?

18. Closure Jesus scored a 14 out of 16 points on his quiz. What percent did he score out of 100%?