A earns 15000 Rs. per month and spends 80% of it. Due to pay revision, his monthly income has increased by 12.5% but due to price rise, he has to spend 22.5% more. His new savings are?

2175

                Income         spend          saving

before   →   100       -      80       =       20

                   ↓+12.5%      ↓+22.5% 

Now     →    112.5    -      98       =       14.5

Initial Savings = 15000 × 20% = 3000

Initial saving ratio = 20

New saving ratio = 14.5

Therefore,

20R = 3000

1R = 150

New savings = 14.5 R = 14.5 × 150 = Rs.2175/-