# Introduction to Percentage

### What is meant by percentage or percent?

Examples:

We use percentage all the time in our day-to-day life.
• At the supermarket: 2% milk
• In the mall: 70% off the price
• A saying: Give it your 100%

The word "percent" is made up of 2 words - per and cent.
Let's first see what "cent" is.

 \$1 = 100 ¢ 1¢ = 1   100th of a \$

 So, percent = 1   100th = 1 part out of 100 parts Similarly, 5 percent = 5 parts out of 100 parts
Note:

We use % to denote percent.

 So, 1 percent = 1% 5 percent = 5%

### The basket of 100 balls

The above basket contains 100 balls of different colours.

There is 1 black ball.
What percentage of balls in the basket is black?

 Black ball = 1 out of 100 = 1%
So, 1% of balls in the basket is black.

There are 10 blue balls.
What is the percentage of blue balls in the basket?

 Blue balls = 10 out of 100 = 10%
So, the basket contains 10% blue balls.

21% of balls in the basket are yellow.
How many yellow balls are there?

 Yellow balls = 21% = 21 out of 100
So, there are 21 yellow balls.

The basket contains 100 objects all of which are balls.
What percent of the objects in the basket are balls?

 Balls = 100 out of 100 objects = 100%
So, 100% of the objects in the basket are balls.