7th and 8th Grade Compound Interest and Percents Quiz

How do you write 56.64% as a decimal?

• 29.61%

• They are the same

• Not enough information

Which is the most accurate way to estimate 20% of 702?

Terrence's town voted on a new speed limit. 44% of the 9,050 votes were in favor of the new speed limit. How many votes were not in favor?

The population of New York in 1980 was about 7.92 million people. In 1990, the population was slightly greater than 8.51 million. What is the percent of increase in New York's population from 1980 to 1990 to the nearest hundredth of a percent?

So far this semester, Derek is averaging a score of 87.4 points on math tests, which is 16.4% lower than his average last semester. What was the average of his scores last semester? Round to the nearest tenth.

Michael buys a limited edition collectable for $104. Each year, he see that the value of the collectable increases by 15% of the previous years value. How much will his collectable be worth after 10 years? Round to the nearest penny

Alex wants to be a millionaire in 22 years, and finds an investment that gains 11.3% interest compounded annually. How much money, rounded to the nearest penny, will he need to invest to reach his goal? Remember to check your answer to make sure that he reaches or exceeds $1,000,000.