Practice Activities - Chapter 7, Lessons 7-11

Estimate. Use compatible numbers and benchmark fractions. 32% of 850

• Approximately 30% of 850 is about 255 (since 10% of 850 is 85, so 30% is about 255).

• Approximately 30% of 850 is about 300 (since 10% of 850 is 85, so 30% is about 300).

• Approximately 32% of 850 is about 600 (since 10% of 850 is 85, so 30% is about 600).

• Approximately 32% of 850 is about 100 (since 10% of 850 is 85, so 30% is about 100).

Estimate. Use compatible numbers and benchmark fractions. 75% of 8.4

• Approximately 75% of 8.4 is about 6.3 (since 75% is 3/4, and 3/4 of 8 is 6).

• Approximately 70% of 8.4 is about 5.88 (since 70% is 7/10, and 7/10 of 8 is 5.6).

• Approximately 80% of 8.4 is about 6.72 (since 80% is 4/5, and 4/5 of 8 is 6.4).

• Approximately 60% of 8.4 is about 5.04 (since 60% is 3/5, and 3/5 of 8 is 4.8).

Estimate. Use the benchmark percents 1% and 10%. 60% of 50

Calculate the percent increase. Round to the nearest tenth of a percent from 60 to 75

• 20.0%

• 25.0%

• 22.5%

• 18.5%

Calculate the percent increase. Round to the nearest tenth of a percent from 45 to 90.5

Find the percent increase. Round to the nearest tenth of a percent from 8.4 to 12.7

Calculate the profit. Round to the nearest cent. Cost: $150 Percent of profit: 10%

Calculate the profit. Round to the nearest cent. Initial cost: $120.75 Profit percentage: 18%

Calculate the selling price. Round to the nearest cent. Cost: $45.50 Percent of profit: 18.3%

A smartphone is priced at $250.00 and sells at a profit of 140%. Find the selling price of the smartphone.

• Selling price = $600.00

• Selling price = $350.00

• Selling price = $500.00

• Selling price = $450.00