Rates, Ratios, Percents, and Simple Interest

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 percent?

Back

To calculate a percent, divide the part by the whole and then multiply by 100. For example, if 25 out of 100 students passed, the percent is (25/100) * 100 = 25%.

Front

What is a unit rate?

Back

A unit rate is a comparison of two different quantities when they are combined together. It expresses how much of one quantity corresponds to one unit of another quantity.

Front

How do you find the total amount of simple interest earned?

Back

Simple interest can be calculated using the formula: Interest = Principal x Rate x Time.

Front

If a recipe requires 2 cups of sugar for 5 servings, how much sugar is needed for 15 servings?

Back

6 cups.

Front

If a class is 55% girls and has 20 girls, how many students are in the class?

Back

36 students.

Front

Alan can bake 66 cupcakes in 3 hours. What is the unit rate of cupcakes per hour?

Back

22 cupcakes per hour.

Front

It snowed 14 inches in 5 hours. How many inches did it snow every hour?

Back

2.8 inches per hour.

Front

What percent is shaded yellow if 1/4 of a shape is colored?

Back

25%.

Front

What is the formula for calculating percent change?

Back

Percent Change = ((New Value - Old Value) / Old Value) x 100.