# Find out the Rate

The simple interest on a sum for 5 years is two-fifth of the sum. The rate percent per annum is

- 10%
- 8%
- 6%
- 12.5%

**Answer:(2) 8%
**Let be the sum is X and rate is R

**Formula**

Simple Interest = (P x R x T)/100 where, P = Principle, R = Rate, T = Time

Now, According to question,

P = X, T = 5 years and Rate =?

SI = X x 2/5 = 2X/5

2X/5 =(X x R x 5)/100

**R = 8% Ans.**

Hence, the rate percent per annum is **8%**