Percent of a Number

Front

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

Back

To find a percentage of a number, multiply the number by the percentage (in decimal form). Formula: (Percentage/100) * Number.

Front

How do you convert a percentage to a decimal?

Back

To convert a percentage to a decimal, divide the percentage by 100. For example, 30% becomes 0.30.

Front

Find 30% of 600.

Back

180

Front

Calculate 40% of 250.

Back

100

Front

Calculate 50% of 180.

Back

90

Front

Find 20% of 400.

Back

80

Front

What is 75% of 120?

Back

90

Front

If you have 200 and want to find 25% of it, what do you do?

Back

Multiply 200 by 0.25 (which is 25% in decimal form). The answer is 50.

Front

What does it mean to find a percentage of a number?

Back

Finding a percentage of a number means calculating a portion of that number based on the percentage given.

Front

How can you check if your percentage calculation is correct?

Back

You can check by reversing the calculation: if you found 20% of a number, multiply the result by 5 (since 100%/20% = 5) to see if you get back to the original number.