Percents

Front

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

Back

Percentage = (Part / Whole) * 100

Front

If Greg answered 9 out of 12 questions correctly, how do you express this as a percentage?

Back

To find the percentage, divide 9 by 12 and multiply by 100, which equals 75%.

Front

In a class of 30 kids, how do you calculate the percentage of kids who forgot to get their report cards signed?

Back

Percentage = (3 / 30) * 100 = 10%.

Front

What is 9% of 200?

Back

To find 9% of 200, multiply 200 by 0.09, which equals 18.

Front

What does the No-No rule refer to in calculating percentage change?

Back

The No-No rule states that you subtract the old value from the new value, then divide by the old value, and multiply by 100 to find the percentage change.

Front

How do you calculate the final price after applying a discount?

Back

Final Price = Original Price - (Discount Percentage * Original Price).

Front

What is the relationship between fractions and percentages?

Back

A percentage is a fraction out of 100. To convert a fraction to a percentage, multiply by 100.

Front

How do you convert a percentage to a decimal?

Back

To convert a percentage to a decimal, divide by 100.

Front

What is the percentage increase if a price goes from $20 to $25?

Back

Percentage Increase = ((25 - 20) / 20) * 100 = 25%.

Front

If a shirt costs $50 and is on sale for 20% off, what is the sale price?

Back

Sale Price = $50 - ($50 * 0.20) = $40.