CFA Grade 6: RP.3

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

How do you calculate the cost of multiple items when given the cost of a smaller quantity?

Back

To find the cost of multiple items, divide the total number of items by the number of items in the smaller quantity, then multiply by the cost of the smaller quantity.

Front

If a store sells 3 apples for $1.50, what is the cost of 1 apple?

Back

$0.50

Front

What is the formula to find the percentage of a number?

Back

Percentage = (Part/Whole) x 100.

Front

How do you find the number of boys in a group if you know the total number and the percentage of girls?

Back

Subtract the number of girls from the total number of students.

Front

If 60% of 300 students are girls, how many girls are there?

Back

180 girls.

Front

What is a proportion?

Back

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

Front

How do you solve a proportion?

Back

Cross-multiply the terms and set the products equal to each other.

Front

If a recipe calls for 4 cups of flour for every 6 cups of sugar, what is the ratio of flour to sugar?

Back

The ratio of flour to sugar is 4:6, which simplifies to 2:3.

Front

How do you scale a recipe if you have more of one ingredient?

Back

Use the ratio of the ingredients to find out how much of the other ingredient is needed.