FLASHCARD Percents (Proportions & Equations)

Front

What is a percent?

Back

A percent is a ratio expressed as a fraction of 100. It represents a part of a whole.

Front

How do you calculate a percent of a number?

Back

To calculate a percent of a number, multiply the number by the percent (in decimal form). For example, to find 25% of 80, calculate 80 * 0.25 = 20.

Front

What is the formula to find the total when given a part and a percent?

Back

The formula is: Total = Part / (Percent in decimal form). For example, if 20 is 25% of a total, Total = 20 / 0.25 = 80.

Front

What does it mean to solve for x in an equation?

Back

Solving for x means finding the value of x that makes the equation true.

Front

If 20% of a number is 4, what is the number?

Back

To find the number, use the formula: Number = Part / (Percent in decimal form). Here, Number = 4 / 0.20 = 20.

Front

How do you convert a fraction to a percent?

Back

To convert a fraction to a percent, divide the numerator by the denominator and multiply by 100. For example, 1/4 = (1 ÷ 4) * 100 = 25%.

Front

What is the relationship between proportions and percents?

Back

Proportions can be expressed as percents. For example, if 1 out of 4 is a proportion, it can be expressed as 25%.

Front

How do you find the percent increase or decrease?

Back

Percent increase = (New Value - Original Value) / Original Value * 100. Percent decrease = (Original Value - New Value) / Original Value * 100.

Front

What is 98% of 200?

Back

To find 98% of 200, calculate 200 * 0.98 = 196.

Front

If Jack gives away 10% of his earnings and it amounts to $256, how do you find his total earnings?

Back

Total earnings = Amount given away / (Percent in decimal form). Here, Total earnings = 256 / 0.10 = $2,560.