Question

20% of a number when subtracted from 108 give the number itself find the number?

My approach:
108-0.2x=x
108=1.2x
108/1.2=90

but the correct ans was 60 how?

Answer 1

Solution: Let the number=x

108-$\frac{20}{100}$×x=x

10800-20x=100x

10800=120x

10800÷120=x

x=90

so, the correct number is 90 instead of 60.

Answer 2

Given:

20% of a number is subtracted from 108 to give the number itself.

To Find:

find the number.

Solution:

Let the number be $x$.

Framing the equation from the given conditions:

$108-0.2x=x$

$108=1.2x$

$x=\frac{108}{1.2}$

   =$90$

Hence the number is 90.