- Topics At a Glance
- Ratios & Proportions
- Unit Rate
- The Golden Ratio
- Solving Proportions
**Percents**- Working with Percents
- Percentage Increase & Decrease
- Percentages in the Real World
- Estimating Percentages
- Converting Decimals to Percents
- Converting Decimals to Fractions
- Converting Percents to Decimals
- Converting Percents to Fractions
- Converting Fractions to Decimals
- Converting Fractions to Percents
- Working with Percents, Fractions & Decimals

A **percent **is just *a fraction with a nice, easy denominator of 100*.

You see percents everywhere: shopping, grades, weather forecasts, sports statistics. Like fractions and decimals, percentages are ways of expressing parts of a whole.

- For example 50% is just 50 out of 100 parts, or

To tell the truth, we probably could get by on fractions and decimals alone. But, percents are friendly, helpful, attractive, and memorable. We kind of have a crush on percents. *Out of 100* is a really simple proportion to deal with (think of a dollar bill… 100 pennies).

When you work with percents, it is important to be able to imagine what they look like. The easiest way to do this is to convert them into fractions. All you need to remember is that a percent is just a fraction with a denominator of 100.

Here are some of the most common percents: