Percent Proportion

Front

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

Back

Percentage = (Part / Whole) * 100

Front

If a student answers 18 questions correctly out of 25, what percentage of questions did they answer correctly?

Back

Percentage = (18 / 25) * 100 = 72%

Front

How do you find the total number of items if you know the percentage and the number of items that represent that percentage?

Back

Total = Part / (Percentage / 100)

Front

What is 40% of 200?

Back

40% of 200 = 0.40 * 200 = 80

Front

If 8 out of 20 books are nonfiction, how do you calculate the percentage of nonfiction books?

Back

Percentage = (8 / 20) * 100 = 40%

Front

What does it mean if 25% of a total is represented by a certain number?

Back

It means that the number is one-fourth of the total.

Front

How can you convert a fraction to a percentage?

Back

Multiply the fraction by 100.

Front

If a student scores 80% on a test with 5 questions, how many questions did they answer correctly?

Back

Correct answers = 80% of 5 = 0.80 * 5 = 4 questions.

Front

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

Back

Percentages are a way to express a fraction out of 100, and can be converted to decimals by dividing by 100.

Front

How do you calculate the percentage increase from one number to another?

Back

Percentage Increase = ((New Number - Original Number) / Original Number) * 100