Percent Proportions Review #1

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 the formula for finding the part in a percent proportion?

Back

The formula is: Part = Percent × Whole. For example, if 30% of a number is 15, then the whole is 15 / 0.30 = 50.

Front

If 12% of the cars that went through the car wash were blue and 75 cars went through, how many were blue?

Back

9 cars were blue.

Front

What is the missing component in the question 'What is 40% of 230?'

Back

The missing component is the part (a).

Front

What is the formula to calculate the tip amount based on a percentage?

Back

Tip Amount = Total Bill × Tip Percentage. For example, if the bill is $85 and the tip is 20%, then Tip Amount = 85 × 0.20 = $17.

Front

How do you find the total number of people if 95% of seats are occupied in an arena of 9,500?

Back

Total People = 9,500 × 0.95 = 9,025.

Front

What does it mean if a question asks for '40% of 230'?

Back

It means you need to find the part that represents 40% of the whole number 230.

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 can you express 20% as a decimal?

Back

20% can be expressed as 0.20 in decimal form.