Percent Proportion Practice

Front

What is a percent proportion?

Back

A percent proportion is a way to express a part of a whole as a percentage. It is often used to compare a part to the total and is calculated using the formula: (part/whole) x 100 = percent.

Front

How do you calculate the time it takes to complete a race based on speed?

Back

To calculate the time to complete a race, use the formula: Time = Distance / Speed. First, find the speed (distance/time) and then apply it to the total distance of the race.

Front

If Mr. Dulin runs 5 miles in 42 minutes, what is his speed in miles per minute?

Back

His speed is calculated as: Speed = Distance / Time = 5 miles / 42 minutes = 0.119 miles per minute.

Front

How do you find out how much of one ingredient is needed when mixing with another?

Back

Use the ratio of the ingredients. If you know the amount of one ingredient, set up a proportion to find the amount of the other ingredient needed.

Front

What is the formula to find what percent one number is of another?

Back

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

Front

If 20 is 80% of what number, how do you find that number?

Back

Set up the equation: 20 = 0.8 * x. To find x, divide both sides by 0.8, giving x = 25.

Front

How do you determine how many items you can buy with a certain amount of money?

Back

Divide the total amount of money by the price of one item. For example, if you have $21 and each item costs $7, then you can buy 21 / 7 = 3 items.

Front

What is the relationship between percentages and fractions?

Back

Percentages are a way to express fractions with a denominator of 100. For example, 40% is equivalent to 40/100 or 2/5.

Front

How do you convert a fraction to a percentage?

Back

To convert a fraction to a percentage, divide the numerator by the denominator and then multiply by 100. For example, 1/4 = 0.25 x 100 = 25%.

Front

What does it mean if something is 40% of a number?

Back

It means that the value is 40 out of every 100 parts of that number. For example, 40% of 50 is 20.