Percents Review

Front

What is the formula to calculate the percentage of a part compared to a whole?

Back

Percentage = (Part / Whole) × 100

Front

If a garden has 10 tulips, 4 rose bushes, and 6 sunflowers, how do you find the percent of tulips in the garden?

Back

Total flowers = 10 + 4 + 6 = 20. Percent of tulips = (10 / 20) × 100 = 50%.

Front

How do you calculate the number of students who do not buy lunch if 65% of 100 students do buy lunch?

Back

Number of students who buy lunch = 65% of 100 = 65. Students who do not buy lunch = 100 - 65 = 35.

Front

What fraction is equivalent to 25%?

Back

25% is equivalent to 1/4.

Front

In a class of 16 students, if there are 4 girls, how do you calculate the percent of boys in the class?

Back

Number of boys = 16 - 4 = 12. Percent of boys = (12 / 16) × 100 = 75%.

Front

How do you convert a fraction to a percentage?

Back

To convert a fraction to a percentage, divide the numerator by the denominator and multiply by 100.

Front

What is 2/5 expressed as a percent?

Back

2/5 = 0.4, and as a percent, it is 40%.

Front

What is the relationship between fractions, decimals, and percentages?

Back

Fractions, decimals, and percentages are different ways to represent the same value. For example, 1/4 = 0.25 = 25%.

Front

How do you find the percent increase or decrease?

Back

Percent change = ((New Value - Old Value) / Old Value) × 100.

Front

What is the percent of a number?

Back

To find the percent of a number, multiply the number by the percentage (as a decimal). For example, 20% of 50 = 0.20 × 50 = 10.