ACT All Percent and Propotions

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 find the percent of a number?

Back

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

Front

What is percent markup?

Back

Percent markup is the amount added to the cost price of an item to determine its selling price, expressed as a percentage of the cost price.

Front

What is percent discount?

Back

Percent discount is the reduction from the original price of an item, expressed as a percentage of the original price.

Front

How do you calculate percent change?

Back

Percent change is calculated by taking the difference between the new value and the old value, dividing by the old value, and then multiplying by 100. Formula: ((New Value - Old Value) / Old Value) * 100.

Front

What is a percent graph?

Back

A percent graph visually represents data in terms of percentages, often using pie charts or bar graphs to show the proportion of each category.

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal. For example, if a/b = c/d, then a, b, c, and d are in proportion.

Front

How do you solve a proportion?

Back

To solve a proportion, cross-multiply the terms and set the products equal to each other. For example, if a/b = c/d, then ad = bc.

Front

What is the relationship between fractions and percents?

Back

Fractions can be converted to percents by dividing the numerator by the denominator and multiplying by 100. For example, 1/4 = 0.25 = 25%.

Front

What is the formula for calculating percent increase?

Back

Percent increase = ((New Value - Original Value) / Original Value) * 100.