Question

A number decreased by 30% gives 84. The number is


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Answer 1

Answer:

Let the certain number be x

A/q

=> x - 30% of x = 84

=> x - 0.3 x = 84

=> x = 84/0.7 = 120

Now,

 Substitute the value of x in question =>

=> 120 - 30% of 120 = 84

=> 120 - 0.3 × 120 = 84

=> 120 - 36 = 84

=> 84 = 84

L.H.S = R.H.S

Hence,  The number is 120.

Answer 2

Answer:

Step-by-step explanation:

70/100*x=84

7x=840

x=840/7

x=120