Ratios and Rates

A ratio is a comparison of two quantities that shows the relative size of one quantity to another, often expressed as 'a to b' or a:b.

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

To find the unit rate, divide the total quantity by the number of units. For example, if you pay $15 for 3 hamburgers, the unit rate is $15 ÷ 3 = $5 per hamburger.

The ratio of flour to sugar is 2:3.

Evan's success rate is 2/3 or approximately 66.67%.

The cost of 1 hamburger is $75 ÷ 15 = $5.

Gabe's speed is 426 miles ÷ 6 hours = 71 miles per hour.

It will take Mrs. Campbell 24 inches ÷ 3 inches/day = 8 days.

The formula for calculating a ratio is: Ratio = Quantity A / Quantity B.

A 1:1 ratio means that for every unit of one quantity, there is one unit of another quantity.