## Where do we use percentage in our daily life?

Percentages are used widely and in many different areas. For example, discounts in shops, bank interest rates, rates of inflation and many statistics in the media are expressed as percentages. Percentages are important for understanding the financial aspects of everyday life.

## How do we solve percent problems?

Percent problems can be solved by writing equations. An equation uses an equal sign (= ) to show that two mathematical expressions have the same value. Percents are fractions, and just like fractions, when finding a percent (or fraction, or portion) of another amount, you multiply.

**How can you use proportions to solve percent problems?**

We’re trying to find the missing PERCENT (out of the whole 100%). In a proportion the cross-products are equal: So 3 times 100 is equal to 4 times the PERCENT. The missing PERCENT equals 100 times 3 divided by 4. (Multiply the two opposite corners with numbers; then divide by the other number.)

**What is the percent of 29 is 3?**

10.34

### How do you solve for parts?

12:44Suggested clip 113 secondsPart, Whole, & Percent Proportion Word Problems – YouTubeYouTubeStart of suggested clipEnd of suggested clip

### What is the formula for proportion?

It can be written in two ways: as two equal fractions a/b = c/d; or using a colon, a:b = c:d. The following proportion is read as “twenty is to twenty-five as four is to five.” In problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion.

**What percentage is 4 out of 20?**

20%

**What is 5 out of 20 as a percentage?**

25%

## What is 7 out of 20 as a percentage?

35%

## What is 14 out of 20 as a grade?

70%