Ramesh saves $26\frac{2}{3}$ % of his monthly salary. When his expenses are increased by 20%, he is able to save ₹4,080 per month. His monthly salary is:

₹34,000

 26\(\frac{2}{3}\)% =  \(\frac{80}{300}\)  , 20% =  \(\frac{1}{5}\)

Let Income = 300R , Saving = 80R & Expenses = 300R - 80R = 220R

Increased expenses = 220R +  \(\frac{1}{5}\) × 220R = 264R

New saving = 300R  - 264R = 36R

ATQ, 

36R = 4080

1R = \(\frac{4080}{36}\) = 113.33

Income = 300R = 300 × 113.33 = 34000