## Introduction to Percentage

#### What is meant by percentage or percent?

We use percentage all the time in our day-to-day lives. Here are some examples:

$1 = 100¢

1¢ = 1/100

So,

percent = 1/100

Similarly,

5 percent = 5 parts out of 100 parts

- At the supermarket: 2% milk
- In the mall: 70% off the price
- A saying: Give it your 100%

**is made up of 2 words -***percent***and***per***. Let's first see what***cent**cent*is.$1 = 100¢

1¢ = 1/100

^{th}of a $So,

percent = 1/100

^{th}= 1 part out of 100 partsSimilarly,

5 percent = 5 parts out of 100 parts

**Note:**

We use % to denote percent. So,

1% = 1 percent

5% = 5 percent

####
1. The basket below contains 100 balls of different colours.

a) What percentage of balls in the basket is black?

b) What is the percentage of blue balls in the basket?

c) How many yellow balls are there?

Total number of balls in the basket = 100

a) Black ball = 1 out of 100 = 1%

So,

**1%**of balls in the basket is black.

b) Blue balls = 10 out of 100 = 10%

So, the basket contains

**10%**blue balls.

c) Yellow balls = 21% = 21 out of 100

So, there are

**21**yellow balls.