A Person invested Rs 12800 and annual rate of C.I increases from X% to (x+7.5)% then the interest earned in 2 yrs increase by Rs 2232. The CI on the sum at (x - 5)%  for 2 yrs is?

To solve this problem, we'll break it down step by step:

1. **Let** the initial interest rate be \( x \% \).
2. When the interest rate increases from \( x \% \) to \( (x + 7.5) \% \), the interest earned in 2 years increases by Rs 2232.

We are given:
- The principal amount \( P = 12800 \).
- The increase in compound interest over 2 years due

A person invested Rs 12800 and the annual rate of compound interest increases from X% to (X + 7.5)%. Then, the interest earned in 2 years increases by Rs 2232. What is the compound interest on the sum at (X - 5)% for 2 years?

Understand how to calculate compound interest on a principal amount of Rs 12800 when the annual rate increases from X% to (X + 7.5)%. This problem explores the changes in compound interest over 2 years and helps determine the CI at (X - 5)% for 2 years. Ideal for students in Grades 9-12.

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