The difference between compound interest and simple interest

The difference between compound interest and simple interest on an amount of Rs. 15,000 for 2 years is Rs. 96. The rate of interest per annum is

Given in question , Principal = Rs. 15,000 , C.I. - S.I. = Rs. 96 , Time = 2 years , Rate = R%
For 2 years,

C.I. – S.I. =	PR²
	10000

⇒ 96 =	15000 × R²
	10000

⇒ 15 R² = 960

⇒ R² =	960	= 64
	15

⇒ R = √64 = 8% per annum