Question

There are 20 balls in a box. Out of them 8 balls are red. Find the percentage of red balls. With working.​

Answer 1

Given:

20 balls out of them 8 are red balls.

To Find:

Percentage of red balls.

How To Find:

To find the percentage of red balls we will take $\dfrac{8}{20}$ and multiply by 100.

Solution:

⇒ $\dfrac{8}{20}\times 100$

Cancel the zeros in 100 and 20,

⇒ $\dfrac{8}{2} \times 10$

Cancel 2 and 10

⇒ 8 × 5

Multiply 8 and 5

⇒ 40%

∴ Therefore the percentage of red balls is 40%.

Answer 2

Before, finding the answer let's see on how to solve the sum.

• Let's first convert the given number to fractions.
• Then, let's convert the fraction to percentage by the percentage formula.

Where,

Y = Total number

X = Red balls

$\sf \dfrac{x}{y} \times 100$

______________________________

Given :

• Total number of balls = 20
• Red balls = 8

To find :

• Percentage of red balls

Solution :

$\sf Percentage = \dfrac{red \: ball}{total \: ball} \times 100$

$\sf Percentage = \dfrac{8}{20} \times 100$

$\sf \: Percentage = \dfrac{800}{20}$

$\sf \: Percentage = 40\%$

Hence, the percentage of Red balls is 40%.