Question

A number when reduced 30% becomes 280. find the number​

Answer 1

Let number be x.
So x-0.3x=280
So 0.7x=280
Therefore x=280/0.7=400

Answer 2

To find : missing number .

Given : A number when reduced 30% becomes 280.

Solution :

• Let , missing number be $x$ .
• Then , according to question we write given condition as :

                   $x - x \times \frac{30}{100} = 280$

• On solving , we get

                       $x ( 1- 0.3 ) = 280\\x = \frac{280}{0.7}\\x = 400$

Hence, the number is $400$.