Question

The result of a number,when decreased by 20% is 192.Find this number.

Answer 1

Let the number be x ; then

x - 20% of x = 192
x - (20/100)x = 192
x-(1/5)x = 192
(5x-1x) = 960
4x = 960

x = 240
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Hence the number is 240

Answer 2

Result of 240 ,when decreased by 20% is 192

Given:

The result of a number, when decreased by 20% is 192

To Find:

Original Number

Solution:

Assume that original number is x

20% of x  is   (20/100)x  = 0.2x

Result when decrease b 20% is :

x - (20 % of x)

= x  - 0.2x

= 0.8x

Equate the result with 192

0.8x = 192

Solve for x

8x = 1920

x = 240

Hence the original number is 240

Result of 240 ,when decreased by 20% is 192