Percent Proportions

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

To calculate the percent of a number, multiply the number by the percent (in decimal form) and then divide by 100. For example, to find 20% of 50, calculate (20/100) * 50 = 10.

A proportion is an equation that states that two ratios are equal. For example, if a/b = c/d, then a, b, c, and d are in proportion.

To solve a proportion, cross-multiply the terms and then solve for the unknown. For example, if a/b = c/d, then a*d = b*c.

The formula is: (Part/Whole) * 100 = Percent. For example, if there are 30 apples and 10 are red, the percent of red apples is (10/30) * 100 = 33.33%.

92

15

40%.

35.5%.

It means that the first number is one-fourth of the second number. For example, 25% of 100 is 25.