Question

110. The number 2400 is first increased by 30%.
The value obtained is next decreased by 20%.
Find the final number.​

Answer 1

Explanation:

(2400)(30/100)

[cancel zeros and multiply the remaining numbers left]

=720/1

=720

2400+ 720 = 3120

the obtained value is 3120

(3120)(10/100)

[cancel zeros and multiply the remaining numbers left]

=312

3120-312=2708

The final number is 2708

Answer 2

Explanation:

$\bf{\underline{\underline\red{Given:-}}}$

• The number 2400 is first increased by 30%

• The value obtained is next decreased by 20%.

$\bf{\underline{\underline\blue{To\:Find:-}}}$

• The final number obtained.

$\bf{\underline{\underline\green{Solution:-}}}$

2400 is first increased by 30%

The increase in number

= 30% of 2400

= $\dfrac{30}{100} \times 2400$

= 30 × 24

= 720

The resulting number

= 2400 + 720

= 3120

Given:-

The resulting number is decreased by 20%

The decrease in number

= 20% of 3120

= $\dfrac{20}{100} \times 3120$

= 2 × 312

= 624

The resulting number

= 3120 - 624

= 2496

Therefore: The final number = 2496