Rates, Ratios, Proportions

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 rate?

Back

A rate is a specific kind of ratio that compares two different units, such as miles per hour or price per item.

Front

What is a proportion?

Back

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

Front

How do you find a unit rate?

Back

To find a unit rate, divide the first quantity by the second quantity to express the comparison in terms of one unit.

Front

If Sira jogs 1/2 mile and walks 3/4 mile, what is the unit rate of jogging to walking?

Back

2/3 mile.

Front

How do you calculate average speed?

Back

Average speed is calculated by dividing the total distance traveled by the total time taken.

Front

If Melissa drives 238 miles in 5 hours, what is her average speed?

Back

48 MPH.

Front

How do you scale a recipe?

Back

To scale a recipe, multiply the ingredients by the same factor to maintain the proportions.

Front

If a recipe calls for 2 eggs to make 10 pancakes, how many eggs are needed for 40 pancakes?

Back

8 eggs.

Front

What does it mean to solve for a variable in an equation?

Back

To solve for a variable means to isolate the variable on one side of the equation to find its value.