Percents and Finding the Whole

Front

What is a percent?

Back

A percent is a way of expressing a number as a fraction of 100. It is often used to compare ratios and express proportions.

Front

How do you find 20% of a number?

Back

To find 20% of a number, multiply the number by 0.20 (or divide by 5).

Front

If 60% of a number is known, how can you find the whole number?

Back

To find the whole number, divide the known amount by the percent (in decimal form). For example, if 60% of a number is 120, divide 120 by 0.60 to get the whole number.

Front

What does it mean if a tank is 75% full?

Back

If a tank is 75% full, it means that 75 out of every 100 parts of the tank's capacity are filled with liquid.

Front

How do you convert a percent to a decimal?

Back

To convert a percent to a decimal, divide the percent by 100. For example, 25% becomes 0.25.

Front

What is the formula to find the whole from a percent?

Back

The formula is: Whole = Part / (Percent in decimal form).

Front

If 15% of a number is 60, how do you find the number?

Back

Divide 60 by 0.15 to find the number.

Front

How can you check if your percent calculation is correct?

Back

You can check by calculating the percent of the whole number you found and see if it matches the part you started with.

Front

What is the relationship between part, whole, and percent?

Back

The relationship is defined by the formula: Percent = (Part / Whole) x 100.

Front

If 60% of the animals in a pet shop are dogs and there are 42 dogs, how do you find the total number of animals?

Back

Divide 42 by 0.60 to find the total number of animals.