M17.5 Unit 3 Ratios, Rates, Percentages

Front

What is a ratio?

Back

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

Front

How do you calculate a unit rate?

Back

To calculate a unit rate, divide the quantity by the number of units. For example, if you drove 216 miles using 6 gallons of gasoline, the unit rate is 216 miles ÷ 6 gallons = 36 miles per gallon.

Front

What is the formula for calculating percentages?

Back

The formula for calculating a percentage is: (part/whole) × 100.

Front

If a basketball team won 9 out of 15 games, how do you find the ratio of games lost to games won?

Back

First, find the number of games lost: 15 - 9 = 6. Then, the ratio of games lost to games won is 6:9, which simplifies to 2:3.

Front

What does it mean to find the cost per item?

Back

Finding the cost per item means dividing the total cost by the number of items to determine how much each item costs.

Front

If Vanessa earned $76.00 in 8 hours, how do you find her hourly wage?

Back

To find her hourly wage, divide the total earnings by the number of hours: $76.00 ÷ 8 hours = $9.50 per hour.

Front

What is a rate?

Back

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

Front

How do you express a ratio in simplest form?

Back

To express a ratio in simplest form, divide both terms of the ratio by their greatest common divisor (GCD).

Front

What is the relationship between ratios and fractions?

Back

Ratios can be expressed as fractions, where the first quantity is the numerator and the second quantity is the denominator.

Front

If Kaleigh is buying apps for $3 each, how much would 7 apps cost?

Back

To find the total cost, multiply the cost per app by the number of apps: $3 × 7 = $21.