📊 Simple Interest Calculation 📊

Let’s denote the principal amount as P and the annual interest rate as R.

The simple interest formula is:
Interest = (P × R × Time) / 100

The difference in amounts after 1 year is the annual interest:
Annual interest = Rs. 854 – Rs. 815 = Rs. 39

Since the interest is simple, the annual interest remains constant. So, the interest for 3 years is:
Interest for 3 years = 3 × Rs. 39 = Rs. 117

Now, let’s find the principal amount (P):
P = Total amount – Interest
= Rs. 815 – Rs. 117
= Rs. 698

🎉 The sum of money (principal) is Rs. 698. 📊