Model Percents

Front

What is a percent?

Back

A percent is a way to express a number as a fraction of 100. It is denoted by the symbol '%'. For example, 50% means 50 out of 100.

Front

How do you convert a fraction to a percent?

Back

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

Front

What does it mean if something is 100%?

Back

If something is 100%, it means the whole or the entirety of that item or quantity is being considered.

Front

How do you find the percent of a number?

Back

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

Front

What is the relationship between fractions and percents?

Back

Fractions and percents are two ways to represent parts of a whole. A percent is a fraction with a denominator of 100.

Front

If 25% of a class of 40 students are girls, how many girls are there?

Back

To find the number of girls, calculate 25% of 40: 40 × 0.25 = 10 girls.

Front

What percent is represented by the fraction 1/2?

Back

The fraction 1/2 is equivalent to 50%.

Front

What is the formula to calculate percent change?

Back

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

Front

If a shirt costs $20 and is on sale for $15, what is the percent discount?

Back

Percent discount = ((20 - 15) / 20) × 100 = 25%.

Front

What does it mean if a pie chart shows 40% in one section?

Back

It means that 40 out of every 100 parts of the whole pie are represented by that section.