Question

A number when increased by 40 percent becomes 42. what is the number​

Answer 1

Answer:

the number is 30.

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Answer 2

Answer:

30

Step-by-step explanation:

Let the number be A

Increase by 40 % = A x 40 %

                           = A x 40 / 100

                            = A x 4 / 10

                            = A x 2 / 5

                           = 2A / 5

Change in number = Original + increase = 42

                              ⇒A + ( 2A /5) = 42

                              ⇒( 5A/5) + ( 2A/5) = 42

                              ⇒ 7A / 5 = 42

                               ⇒ 7A = 42 x5

                              ⇒ A = ( 42 x5) / 7

                              ⇒ A = ( 6x 5)

                              ⇒ A = 30

The original number is 30