Monthly income of Mohit is ₹12800 and his monthly expenditure is ₹ 4000. If his income is decreased by 25% and expenditure is decreased by ₹1000, then find the decrease in his monthly savings?

The correct option is ₹ 2200.

Here is the step-by-step breakdown of Mohit's income, expenditure, and savings:
First, let's list the initial values given in the problem:
• Monthly Income = ₹ 12800
• Monthly Expenditure = ₹ 4000

Step 1: Calculate the original monthly savings
Savings are calculated by subtracting the expenditure from the income:

$$\text{Original Savings}=\text{Original Income}-\text{Original Expenditure}$$

$$\text{Original Savings}=12800-4000=8800$$

So, Mohit's original monthly savings were ₹ 8800.

Step 2: Calculate the new monthly income
Mohit's income is decreased by 25%. Let's find the amount of this decrease:

$$\text{Decrease in Income}=25\%\text{of}12800$$

$$\text{Decrease in Income}=\frac{25}{100}\times 12800=3200$$

Now, calculate the new income:

$$\text{New Income}=12800-3200=9600$$

Step 3: Calculate the new monthly expenditure
The monthly expenditure is decreased by ₹ 1000:

$$\text{New Expenditure}=4000-1000=3000$$

Step 4: Calculate the new monthly savings
Subtract the new expenditure from the new income:

$$\text{New Savings}=\text{New Income}-\text{New Expenditure}$$

$$\text{New Savings}=9600-3000=6600$$

Step 5: Find the decrease in monthly savings
Subtract the new savings from the original savings:

$$\text{Decrease in Savings}=\text{Original Savings}-\text{New Savings}$$

$$\text{Decrease in Savings}=8800-6600=2200$$

Therefore, the decrease in his monthly savings is ₹ 2200.