Ratios and Percents

Front

What is a ratio?

Back

A ratio is a comparison of two quantities, showing how many times one value contains or is contained within the other.

Front

What is a percent?

Back

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

Front

How do you calculate 30% of a number?

Back

To calculate 30% of a number, multiply the number by 0.30 (or 30/100). For example, 30% of 200 is 200 x 0.30 = 60.

Front

What is the formula to find the percentage of a part compared to a whole?

Back

The formula is: (Part/Whole) x 100 = Percentage.

Front

If 18 out of 25 students belong to a club, how do you find the percentage of students in the club?

Back

Use the formula: (18/25) x 100 = 72%.

Front

What does it mean to find the cost per item?

Back

Finding the cost per item means dividing the total cost by the number of items to determine the price of each individual item.

Front

How do you calculate the cost per apple if 8 apples cost $4.72?

Back

Divide the total cost by the number of apples: $4.72 / 8 = $0.59 per apple.

Front

What is the percentage of games won if a team won 6 out of 15 games?

Back

Use the formula: (6/15) x 100 = 40%.

Front

What is the relationship between ratios and fractions?

Back

Ratios can be expressed as fractions, where the first quantity is the numerator and the second quantity is the denominator.

Front

How can you convert a fraction to a percent?

Back

To convert a fraction to a percent, divide the numerator by the denominator and then multiply by 100.