Question

what will be 80% of a number whose 200% is 90?

Answer 1

Let Number be x

We are given, x*200/100 = 90
                 = 2x = 90
                 = x = 45

So, 80% of Number (45) = 45*80/100 = 45*8/10 = 360/10 = 36

Answer 2

Given:

200%of a number=90

80%of a number=?

To find the value of  80% of a number whose 200% is 90

Solution:

Let a number be 'x'.

According to the question,

200% of x=90

200/100×x=90

or, 200x=9000

or, x=9000/200

x=45

Again,

80%of x

=80%of45

=80/100×45

=36

Thus, 80% of the number will be 36.