Question

ek adami apani income ka 20% bachata hai lekin mahengai badhane par keval20 Rs bacha pata hai, to us adami ki income batao?

Answer 1

adami apani income ka 20% bachata hai jo ki Rs. 20 hai

So 20% = Rs. 20
100% = 20×(100/20) = Rs. 100
Aadmi ka income Rs. 100 hai.

Answer 2

He saves Rs. 20 of his 20% of his income.
  Den,
 ⇒20% = Rs. 20

According to ques.

⇒100% = 20×(100/20) = Rs. 100

So . his income is Rs. 100