Percent -Part whole-Tax and Tips

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 x 0.20 = 10.

Front

What is the formula to find the total cost including tax or tip?

Back

Total Cost = Original Cost + (Original Cost x Tax/Tip Rate).

Front

If a meal costs $40 and the tip is 15%, how much is the tip?

Back

Tip = $40 x 0.15 = $6.

Front

What is the relationship between part, whole, and percent?

Back

Percent is the part divided by the whole, multiplied by 100. Formula: Percent = (Part/Whole) x 100.

Front

How do you convert a percentage to a decimal?

Back

To convert a percentage to a decimal, divide by 100. For example, 25% = 25/100 = 0.25.

Front

What is 30% of 200?

Back

30% of 200 = 200 x 0.30 = 60.

Front

If 80% of a class of 25 students passed an exam, how many students passed?

Back

Number of students passed = 25 x 0.80 = 20 students.

Front

How do you find the original price before tax if the total is $50 and tax is 10%?

Back

Original Price = Total / (1 + Tax Rate). Original Price = $50 / 1.10 = $45.45.

Front

What is the total bill if a meal costs $50 and a 20% tip is added?

Back

Total Bill = $50 + ($50 x 0.20) = $50 + $10 = $60.