Percentages Revised

Front

What is a percentage?

Back

A percentage is a way of expressing a number as a fraction of 100. It shows how much of something there is compared to the whole.

Front

How do you calculate a percentage of a number?

Back

To calculate a percentage of a number, multiply the number by the percentage (in decimal form). For example, to find 30% of 200, calculate 200 x 0.30 = 60.

Front

What does it mean if 30% of a class passed a test?

Back

It means that out of the total number of students in the class, 30 out of every 100 students passed the test.

Front

If 65% of a shape is shaded, what fraction of the shape is shaded?

Back

65% can be expressed as the fraction 65/100, which simplifies to 13/20.

Front

How do you convert a fraction to a percentage?

Back

To convert a fraction to a percentage, divide the top number (numerator) by the bottom number (denominator) and then multiply by 100.

Front

What is 20% of $70?

Back

20% of $70 is calculated as $70 x 0.20 = $14.

Front

If a store has a sale of 25% off, how do you find the sale price?

Back

To find the sale price, calculate the discount amount by multiplying the original price by 0.25, then subtract that amount from the original price.

Front

What is the percentage of red starburst in a bag of 40 if 30% are red?

Back

30% of 40 is calculated as 40 x 0.30 = 12 red starburst.

Front

How do you express 13 out of 50 states as a percentage?

Back

To express 13 out of 50 as a percentage, divide 13 by 50 and multiply by 100. (13/50) x 100 = 26%.

Front

What is the formula for finding the percentage increase?

Back

Percentage increase = ((new value - old value) / old value) x 100.