7th Gr Final Review #2 - Ch 2 Percents

Front

What is a percent?

Back

A percent is a ratio expressed as a fraction of 100. It represents a part of a whole.

Front

How do you calculate a percentage of a number?

Back

To calculate a percentage of a number, multiply the number by the percentage (in decimal form). For example, to find 15% of 76, calculate 76 * 0.15.

Front

What is a discount?

Back

A discount is a reduction in the price of a product or service, often expressed as a percentage.

Front

How do you find the final price after a discount?

Back

To find the final price after a discount, subtract the discount amount from the original price. Final Price = Original Price - Discount.

Front

What is simple interest?

Back

Simple interest is calculated on the principal amount only, not on the interest accrued over time.

Front

How do you calculate simple interest?

Back

Simple Interest = Principal x Rate x Time. For example, for $5000 at 6% for 3 years, it would be 5000 * 0.06 * 3.

Front

What is the formula for calculating the total amount in a savings account with simple interest?

Back

Total Amount = Principal + Simple Interest.

Front

What does it mean if 40% of a group are boys?

Back

It means that out of the total group, 40 out of every 100 members are boys.

Front

How do you find the number of girls if 40% of 200 children are boys?

Back

If 40% are boys, then 60% are girls. Calculate 60% of 200: 200 * 0.60 = 120 girls.

Front

What is a tip in the context of dining?

Back

A tip is a small amount of money given to a server for their service, often calculated as a percentage of the total bill.