Examples 1–3 Find each number. Round to the nearest tenth if necessary.- What percent of 50 is 18? 2. What percent of $90 is $9?
- What number is 2% of 35? 4. What number is 25% of 180?
55 9 is 12% of which number? 6. 62 is 90.5% of what number?
Example 4 7. MEASUREMENT If a box of Brand A cereal30% More
Cerealcontains 10 cups of cereal, how many
more cups of cereal are in a box of
Brand B cereal?= Step-by-Step Solutions begin on page R1.
Extra Practice begins on page EP2.Examples 1–3 Find each number. Round to the nearest tenth if necessary.- What percent of 60 is 15? 9. $3 is what percent of $40?
- What number is 15% of 60? 11. 12% of 72 is what number?
- 9 is 45% of what number? 13. 75 is 20% of what number?
Example 4 14. SCHOOL Roman has 2 red pencils in his backpack. If this is 25% of the
total number of pencils, how many pencils are in his backpack?- BASKETBALL Eileen and Michelle scored 48% of their team’s points. If
their team had a total of 50 points, how many points did they score? - SHOES A pair of sneakers is on sale as shown.
This is 75% of the original price. What was
the original price of the shoes?
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$$$$$$^555555111111 - BOOKS Of the 60 books on a
bookshelf, 24 are nonfiction. What
percent of the books are nonfiction?
Find each number. Round to the nearest hundredth if necessary.
B- What percent of 25 is 30? 19. What number is 8.2% of 50?
- 40 is 50% of what number? 21. 12.5% of what number is 24?
- What number is 0.5% of 8? 2323 What percent of 300 is 0.6?
- ASTRONOMY Use the table shown.
a. Mercury’s radius is what percent of
Jupiter’s radius?
b. If the radius of Mars is about 13.7% of
Neptune’s radius, what is the radius
of Neptune?
Planet Radius (km)
Mercury 2,440
Mars 3,397
Jupiter 71,492c. Earth’s radius is about 261.4% of Mercury’s
radius. What is the radius of Earth?Lesson 2B Proportions and Equations 335331_341_C06_L2_895130.indd 335 12/30/09 4:05 PM