Question

find the number which when increased by 30% becomes 39​

Answer 1

Answer:

Step-by-step explanation:

Let the required number be 'x'.

According to question:-

→ x + 30% of x = 39

→ x + 30/100 × x = 39

→ x + 30x/100 = 39

→ (100x + 30x)/100 = 39

→ 130x/100 = 39

→ x = 39×100/130

→ x = 30

Therefore, the required number is 30.

Please mark as 'Brainliest Answer'.

Answer 2

Answer:

The original number is $30$.

Step-by-step explanation:

Given : % increase of a number = $30$%

           New number formed = $39$

To find : The original number.

Solution :

• It is given that the % increase of a number = $30$%

                  New number formed = $39$

• We have to find the original number.
• Let, $x$ be the original number.
• The required equation becomes,

      $x+30$% of $x=39$

         ∴ $x+\frac{30}{100} *x=39$

         ∴ $\frac{100x+30x}{100} =39$

• Transpose $100$ to other side, we get

            ∴ $130x=39*100$

            ∴ $130x=3900$

               ∴ $x=\frac{3900}{130}$

• Transpose $30$ to other side, we get

               ∴ $x=30$

• ∴ The original number is $30$.