Question

a number when decrease by 30%becomes 35. find the number​

Answer 1

$\huge\mathfrak{Solution:}$

Let the number be x

According to question

$x - \frac{30}{100}x = 35 \\ x - \frac{3}{10}x = 35 \\ \frac{10x - 3x}{10} = 35 \\ \frac{7x}{10} = 35 \\ x = \frac{350}{7} \\ x = 50$

Required number=50

Answer 2

Explanation:-

A number when dectease by 30% becomes 35.

To find the required number.

Solution:-

Let the number be x.

A/Q

→$x - 30 \% of x = 35$

→$x - \dfrac{30}{100}\times x= 35$

→$x - \dfrac{30x}{100} = 35$

→$\dfrac{100x -30x}{100}= 35$

→$\dfrac{70x}{100}= 35$

→$70 x = 3,500$

→$x = \dfrac{3,500}{70}$

→$x = 50$

Hence,

The required number will be 50.