Percent Proportions

Front

What is a percent proportion?

Back

A percent proportion is a way to express a ratio in terms of a percentage, showing how one quantity relates to another as a fraction of 100.

Front

How do you calculate the number of correct answers from a percentage score?

Back

Multiply the total number of questions by the percentage (as a decimal). For example, for 85% of 25 questions: 25 x 0.85 = 21.

Front

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

Back

Percentage = (Part / Whole) x 100.

Front

If Joey has 8 pairs of socks and 5 are white, how do you find the percentage of colored socks?

Back

First, find the number of colored socks: 8 - 5 = 3. Then, calculate the percentage: (3 / 8) x 100 = 37.5%.

Front

How do you determine what percent of a total amount was spent?

Back

Divide the amount spent by the total amount and multiply by 100. For example, if $85 was spent from $125: (85 / 125) x 100 = 68%.

Front

What does it mean if 40% of students take the bus?

Back

It means that 40 out of every 100 students in the class use the bus to get to school.

Front

How do you find the number of students who do not take the bus if 40% do?

Back

If 40% take the bus, then 60% do not. To find the number of students not taking the bus, calculate 60% of the total number of students.

Front

What is 15% of 82?

Back

To find 15% of 82, multiply: 0.15 x 82 = 12.3.

Front

How do you convert a fraction to a percentage?

Back

Divide the numerator by the denominator and multiply by 100. For example, 1/4 = (1 ÷ 4) x 100 = 25%.

Front

What is the relationship between percentages, fractions, and decimals?

Back

Percentages are a way to express fractions with a denominator of 100. To convert a percentage to a decimal, divide by 100.