7.NS.3

Front

What is a ratio?

Back

A ratio is a relationship between two numbers that shows how many times the first number contains the second. It is often expressed as 'a:b'.

Front

How do you find the total number of items in a ratio?

Back

To find the total number of items in a ratio, add the parts of the ratio together and then multiply by the number of times the ratio fits into the total.

Front

If a bag contains red and blue marbles in the ratio 4:5 and there are 36 marbles in total, how many are red?

Back

16

Front

What is fuel efficiency?

Back

Fuel efficiency is a measure of how far a vehicle can travel per unit of fuel consumed, typically expressed in miles per gallon (mpg).

Front

How do you calculate fuel efficiency?

Back

Fuel efficiency is calculated by dividing the distance traveled by the amount of fuel used.

Front

If a car travels 150 miles using 5 gallons of gas, what is the car's fuel efficiency?

Back

25 miles per gallon.

Front

What is a proportion?

Back

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

Front

How do you maintain a ratio when scaling a recipe?

Back

To maintain a ratio when scaling a recipe, multiply each part of the ratio by the same factor.

Front

If a recipe requires a ratio of 3 cups of flour to 2 cups of sugar, how many cups of sugar do you need for 9 cups of flour?

Back

6 cups.

Front

What does it mean to find a percentage of a number?

Back

Finding a percentage of a number means calculating how much that percentage represents in terms of the number.