7th Grade Ratios and Proportions Test Review

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division, showing how many times one value contains or is contained within the other.

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

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 25% of 45, calculate 45 * 0.25 = 11.25.

Front

What is the formula to find the sale price after a discount?

Back

Sale Price = Original Price - (Original Price * Discount Rate).

Front

If a sweater costs $45 and is on sale for 25% off, what is the sale price?

Back

$33.75

Front

How do you calculate a tip based on a bill?

Back

To calculate a tip, multiply the total bill by the tip percentage (in decimal form). For example, for a $47.59 bill with a 20% tip, calculate 47.59 * 0.20 = 9.52.

Front

What is the direct variation equation?

Back

The direct variation equation is y = kx, where k is the constant of variation.

Front

If Timothy worked 40 hours and earned $660, what is his hourly wage?

Back

His hourly wage is $16.50 (660 / 40 = 16.50).

Front

What is the area of a rectangle?

Back

The area of a rectangle is calculated by multiplying its length by its width (Area = Length * Width).

Front

If a scale drawing has a length of 6 inches and a width of 4.5 inches, and the actual room length is 18 feet, what is the area of the actual room?

Back

The area of the actual room is 243 square feet.