Unit 3 Test Review 7.4d 7.4b 7.4e

Front

What is a proportion?

Back

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

Front

How do you solve for k in the proportion k/10 = 5/2?

Back

Cross-multiply to get 2k = 50, then divide by 2 to find k = 25.

Front

If a fish makes 480 dives in 10 hours, how many dives does it make in 1 hour?

Back

48 dives per hour.

Front

What is the formula to calculate percentage?

Back

Percentage = (Part/Whole) x 100.

Front

If Courtney got 64 out of 75 correct, what is her percentage score?

Back

Percentage = (64/75) x 100 = 85%.

Front

What is a unit rate?

Back

A unit rate is a comparison of two different quantities when they are combined together, expressed as a quantity per 1 unit.

Front

How do you find the unit rate of customers per hour if a store sees 120 customers in 8 hours?

Back

Divide the total number of customers by the total hours: 120 customers / 8 hours = 15 customers per hour.

Front

What are the units for speed if a car is going 50 miles per hour?

Back

Miles and hours.

Front

How do you convert a fraction to a percentage?

Back

Multiply the fraction by 100.

Front

What is the relationship between ratios and proportions?

Back

Ratios compare two quantities, while proportions state that two ratios are equal.