Question

45 percentage of a number is 21 less than 4 by 5

Answer 1

Let the no. be x
Given that,
45% of x = 21-(4/5)
or, 45% of x = 101/5
or, x = (101/5)/(45/100)
or, x = 404/9..

The no. is 404/9

Answer 2

let the required number be x
a/q
45x/100=4/5-21
45x/100=-101/5
45x=-2020
x=-2020/45=-404/9