## What are percentages in the real world?

Percentages are used to figure out how much money we need to put 10% down on an apartment, how much we’ll pay for the 6.25% sales tax on our new monster truck, and how much we save when the camera we’re buying is on clearance for 57% off.

**Why are percentages useful?**

Percentages are useful in practice, because it allows one to compare things that are not out of the same number. For example, exam marks are often percentages, which can compare them even if there are more questions on one exam paper than the other.

### How do we use percent Composition in our daily lives?

In the laboratory, density can be used to identify an element, while percent composition is used to determine the amount, by mass, of each element present in a chemical compound. In daily life, density explains everything from why boats float to why air bubbles will try to escape from soda.

**Where can you find percentages?**

In finding the percent of a number, divide the percentage by the quantity then multiply the product by 100. Put a percent symbol (%) after the final product. If the percentage is greater than the quantity, this means that the percent is greater than 100%.

#### Where is percentile used in real life?

In everyday life, percentiles are used to understand values such as test scores, health indicators, and other measurements. For example, an 18-year-old male who is six and a half feet tall is in the 99th percentile for his height.

**What types of jobs use percentages?**

Banks, restaurants, movie theaters and department stores all use percentages, so teller, wait staff and store clerk positions are included here.

## How do you explain percentages?

In mathematics, a percentage is a number or ratio that can be expressed as a fraction of 100. If we have to calculate percent of a number, divide the number by whole and multiply by 100. Hence, the percentage means, a part per hundred. The word per cent means per 100.

**Which element of percent represent the whole?**

the percent, has the percent symbol (%) or the word “percent” the amount, the amount is part of the whole. and the base, the base is the whole amount.

### What is the mass percent of oxygen?

72.71 %

For oxygen: mass % O = (mass of 1 mol of oxygen/mass of 1 mol of CO2) x 100. mass % O = (32.00 g / 44.01 g) x 100. mass % O = 72.71 %

**How do you find percentages quickly?**

Generally, the way to figure out any percentage is to multiply the number of items in question, or X, by the decimal form of the percent. To figure out the decimal form of a percent, simply move the decimal two places to the left. For example, the decimal form of 10 percent is 0.1.