Rates and Ratios

Front

What is a Ratio?

Back

A ratio is a comparison of two quantities, showing the relative size of one quantity to another.

Front

How do you determine the better buy when comparing prices?

Back

To determine the better buy, calculate the unit price for each option and compare them. The option with the lower unit price is the better buy.

Front

If a jar of peanut butter costs 32 cents per ounce and contains 5 ounces, how do you calculate the total cost?

Back

Multiply the cost per ounce by the number of ounces: 32 cents/ounce * 5 ounces = $1.60.

Front

How do you find the rate of an event per unit of time?

Back

To find the rate, divide the total number of events by the total time period. For example, if Jack jumps 40 times in 4 minutes, the rate is 40 jumps / 4 minutes = 10 jumps per minute.

Front

What is the formula to calculate the number of students per class?

Back

To calculate the number of students per class, divide the total number of students by the number of classes. For example, 88 students / 4 classes = 22 students per class.

Front

What is a unit rate?

Back

A unit rate is a ratio that compares a quantity to one unit of another quantity, often expressed as 'per' something (e.g., miles per hour).

Front

How can 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 difference between a ratio and a proportion?

Back

A ratio is a comparison of two quantities, while a proportion states that two ratios are equal.

Front

How do you convert a ratio to a percentage?

Back

To convert a ratio to a percentage, divide the first quantity by the second quantity, then multiply by 100.

Front

What is the significance of equivalent ratios?

Back

Equivalent ratios are ratios that express the same relationship between quantities, even if the numbers are different.