6.3 flashcard alg a

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, 25% becomes 0.25.

Front

What is 25% of 144?

Back

36

Front

If 28% of a number is 14, what is the number?

Back

To find the number, divide 14 by 0.28. The number is 50.

Front

What percent of 50 is 14?

Back

To find the percent, divide 14 by 50 and multiply by 100. The answer is 28%.

Front

How do you find the percentage increase from 20 to 30?

Back

Percentage increase = ((New Value - Old Value) / Old Value) * 100. Here, it is ((30 - 20) / 20) * 100 = 50%.

Front

What is the relationship between fractions and percentages?

Back

A percentage is a fraction out of 100. For example, 25% is equivalent to 25/100 or 1/4.

Front

How do you calculate the percentage decrease from 80 to 60?

Back

Percentage decrease = ((Old Value - New Value) / Old Value) * 100. Here, it is ((80 - 60) / 80) * 100 = 25%.

Front

What is 70% of 200?

Back

140

Front

If 60% of a number is 30, what is the number?

Back

To find the number, divide 30 by 0.60. The number is 50.