The Percent Proportion-Lesson 4
COPY NOTES then try the exercises. Check with teacher before you move on to next station.
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Station 1:
Exercises
Find each number. Round to the nearest tenth if necessary.
1. What number is 25% of 20? 2. What percent of 50 is 30?
3. 30 is 75% of what number? 4. 40% of what number is 36?
5. What number is 20% of 625? 6. 12 is what percent of 30?
Station 2:
Visit the below website and read through the article, read the examples, take notes as needed, and practice examples on site.
1. What number is 3% of 100? 2. What percent of 200 is 0.5?
3. What number is 0.4% of 20? 4. What number is 6.1% of 60?
5. 10.4% of what number is 13?
6. WEDDING Of the 125 guests invited to a wedding, 104 attended the wedding. What percent of the invited guests attended thewedding?
7. CAMERA The memory card on Melcher's digital camera can hold about430 pictures. Melcher used 18% of the memory card while taking pictures at a family reunion. About how many pictures did Melcher take at the family reunion? Round to the nearest whole number.
Station 3:
Watch the video and complete problems below
Find each number. Round to the nearest tenth if necessary.
1. 50 is 20% of what number? 2. What percent of 20 is 4?
3. What number is 70% of 250? 4. 40% of what number is 82?
5. OCEANS Use the table shown.
Ocean / Area(square miles)
Pacific / 64 million
Atlantic / 32 million
Indian / 25 million
a. The area of the Indian Ocean is what percent of the area of the Pacific Ocean? Round to the nearest whole percent.
b. If the area of the Arctic Ocean is 16% of the area of the Atlantic Ocean, what is the area of the Arctic Ocean? Round to the nearest whole million.
Station 4:
Visit the following site and watch the video and complete the word problems.
1. DRIVING Mudrik installed a device on his car that guaranteed to increase his gas mileage by 15%. He currently gets 22 miles per gallon. How much will the gas mileage increase after installing the device? / 2. POPULATION The number of students at Marita's school decreased to 98% of last year's number. Currently, there are 1,170 students. How many students were there last year? Round to the nearest whole number.3. VOTING Yolanda's club has 35 members. Its rules require that60% of them must be present for any vote. At least how many members must be present to have a vote? / 4. GARBAGE This month, Chun's office produced 690 pounds of garbage. Chun wants to reduce the weight of garbage produced to 85% of the weight produced this month. What is the target weight for the garbage produced next month?