Sonu decided to donate 12% of her monthly income to a charitable trust. On the day of donation, she changed her decision and donates a sum of ₹2160 which is equal to 125% of what she decided to donate earlier. Her monthly income is:

₹14400

125% = \(\frac{5}{4}\) & 12% = \(\frac{3}{25}\) 

\(\frac{5}{4}\)  of Initial decided donation Amount = 2160

Initial decided donation amount =  \(\frac{4}{5}\) × 2160 = 1728

Initial decided donation amount = 12% of monthly  Income

Monthly income = \(\frac{25}{3}\) × 1728 = 14400