Question

A number is reduced by 20% and then again reduced by 10%. If the number now becomes 144, then the original number was ​

Answer 1

• Step-by-step explanation:

Let original no. be 100

100×(1-20/100)×(1-10/100)

100×80/100×90/100

=72

Decrease =100-72

=28

Now, Original no. Remaining no.

100 72

X 144

100×144=72×X

X=200

Hope this helps :)

Pls mark it brainliest

Answer 2

Answer:

Given:

A number is reduced by 20% and then again reduced by 10%.

It now becomes 144.

Solution:

Let the number be x

Therefore,

20% of x = x/5

Hence, the first reduced number is x - x/5 = 4x/5

It is again reduced by 10%

Hence, 10% of 4x/5 = 2x/25 and the final reduced number is 4x/5 - 2x/25 = 18x/25

Now, ATQ.

18x/25 = 144

=⟩ x = (144 × 25) / 18

= 200

Answer:

When 200 is reduced by 20% and then again by 10% then it becomes 144.

Hope this helped you, cheers :)