Percents and percent problems

Front

What is a percent?

Back

A percent is a ratio expressed as a fraction of 100. It represents a part of a 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 20% of 50, calculate 50 * 0.20 = 10.

Front

What is simple interest?

Back

Simple interest is calculated on the principal amount only, not on the interest accrued. The formula is: Interest = Principal x Rate x Time.

Front

How do you find the percent increase?

Back

Percent increase is calculated by taking the difference between the new value and the original value, dividing by the original value, and multiplying by 100. Formula: ((New Value - Original Value) / Original Value) x 100.

Front

How do you find the percent decrease?

Back

Percent decrease is calculated by taking the difference between the original value and the new value, dividing by the original value, and multiplying by 100. Formula: ((Original Value - New Value) / Original Value) x 100.

Front

What is the formula for calculating simple interest?

Back

The formula for calculating simple interest is: Interest = Principal x Rate x Time.

Front

If 30% of 60 students prefer dogs, how many students is that?

Back

30% of 60 is calculated as 60 * 0.30 = 18 students.

Front

What does it mean to find a percent of a total?

Back

Finding a percent of a total means calculating how much that percent represents in relation to the whole amount.

Front

What is the relationship between fractions and percents?

Back

Percents are a specific type of fraction where the denominator is always 100. For example, 25% is equivalent to 25/100.

Front

How do you convert a fraction to a percent?

Back

To convert a fraction to a percent, divide the numerator by the denominator and multiply by 100. For example, 1/4 = (1 ÷ 4) x 100 = 25%.