Ratios and percentages

Front

What is a ratio?

Back

A ratio is a relationship between two numbers indicating how many times the first number contains the second.

Front

How do you convert a percentage to a decimal?

Back

To convert a percentage to a decimal, divide the percentage by 100.

Front

What is 20% of a number?

Back

To find 20% of a number, multiply the number by 0.20.

Front

How do you find the percentage of a part compared to a whole?

Back

To find the percentage of a part compared to a whole, divide the part by the whole and multiply by 100.

Front

What is the formula for calculating a percentage?

Back

Percentage = (Part / Whole) x 100.

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.

Front

What is the relationship between fractions and percentages?

Back

Fractions can be converted to percentages by multiplying the fraction by 100.

Front

How do you calculate the total number of items from a ratio?

Back

To calculate the total number of items from a ratio, add the parts of the ratio together and then use the ratio to find the individual parts.

Front

What is 25% of 500?

Back

25% of 500 is 125.

Front

How do you convert a decimal to a percentage?

Back

To convert a decimal to a percentage, multiply the decimal by 100.