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 percent to a decimal?

Back

To convert a percent to a decimal, divide the percent by 100. For example, 25% as a decimal is 25 ÷ 100 = 0.25.

Front

What is the formula for calculating simple interest?

Back

The formula for simple interest is: Interest = Principal × Rate × Time. Where Principal is the initial amount, Rate is the interest rate (as a decimal), and Time is the duration in years.

Front

If a shirt costs $20 and there is a 10% sales tax, how much will you pay in total?

Back

Total cost = $20 + (10% of $20) = $20 + $2 = $22.

Front

What is 75% of 200?

Back

75% of 200 is 0.75 × 200 = 150.

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 decimal equivalent of 45%?

Back

The decimal equivalent of 45% is 0.45.

Front

If you have a principal of $1,000 at a 5% interest rate for 3 years, how much interest will you earn?

Back

Interest = $1,000 × 0.05 × 3 = $150.

Front

What is 4.5% of $100?

Back

4.5% of $100 is 0.045 × 100 = $4.50.

Front

How do you calculate the total amount after tax?

Back

To calculate the total amount after tax, add the tax amount to the original price. For example, if the price is $50 and tax is 8%, total = $50 + ($50 × 0.08) = $54.