**Lesson of the Week: Calculating Percent**

Percent translates to "Per 100".

Percent is a

Sometimes the ratio already has a second term or denominator of 100, but many times it does not.

When working with percent, the ultimate objective is to convert the second term of the ratio to 100!

There are many different strategies that can be utilized when working out percent problems.

Here are a few of those strategies:

Strategy 1: Calculate an equivalent ratio.

Set the second term of the equivalent ratio to 100.

Multiply or divide both terms of the first ratio by the same whole number.

What percent is equal to 8/10?

8/10 = ?/100

10 x 10 = 100, so 8 x 10 = 80.

Therefore, 8/10 = 80/100

80/100 "80 per 100" = 80%, therefore, 8/10 = 80%

What percent is equal to 13/25?

13/25 = ?/100

25 x 4 = 100, so 13 x 4 = 54.

Therefore, 13/25 = 54/100

54/100 "54 per 100" = 54%, therefore, 13/25 = 54%

What percent is equal to 81/450?

81/450 can be simplified to lowest terms by dividing both terms by 9, therefore, 81/450 = 9/50

9/50 = ?/100

50 x 2 = 100, so 9 x 2= 18.

Therefore, 9/50 = 18/100

Percent translates to "Per 100".

Percent is a

__very____special____ratio__,*a ratio always per 100*.Sometimes the ratio already has a second term or denominator of 100, but many times it does not.

When working with percent, the ultimate objective is to convert the second term of the ratio to 100!

There are many different strategies that can be utilized when working out percent problems.

Here are a few of those strategies:

Strategy 1: Calculate an equivalent ratio.

Set the second term of the equivalent ratio to 100.

Multiply or divide both terms of the first ratio by the same whole number.

What percent is equal to 8/10?

8/10 = ?/100

10 x 10 = 100, so 8 x 10 = 80.

Therefore, 8/10 = 80/100

80/100 "80 per 100" = 80%, therefore, 8/10 = 80%

What percent is equal to 13/25?

13/25 = ?/100

25 x 4 = 100, so 13 x 4 = 54.

Therefore, 13/25 = 54/100

54/100 "54 per 100" = 54%, therefore, 13/25 = 54%

What percent is equal to 81/450?

81/450 can be simplified to lowest terms by dividing both terms by 9, therefore, 81/450 = 9/50

9/50 = ?/100

50 x 2 = 100, so 9 x 2= 18.

Therefore, 9/50 = 18/100