Question

A number when decreased 20℅ becomes 400 . Find the original number?​

Answer 1

Answer:

the original number is 500.

Step-by-step explanation:

let the number be x

according to the situation,

x- 20% of x = 400

x - 20/100 × x= 400

x- x/5 = 400

4x/5= 400

x= 500

Answer 2

Answer:

Step-by-step explanation:

Let the original number be x

⇒ $\frac{100}{2}*x=400$

⇒  x = $\frac{2}{100}*400$

⇒  x = $\frac{800}{100}$

⇒ 8

So, Original number will be 400 + 8 = 408.

∴ 408 is original number.