Simple interest on a certain sum of mine at 9% is rupees 450 in 2 years. Find the compound interest on the same sum at the same rate for 1 year if the interest is reckoned half-yearly

Simple interest for 1 year = 450/2 =225 let x be the principal 9x/100=225 x=2500

2500*(9/100)= 225 capital for the second half year =2725

2725*(9/100)= 245.25 so compounded interest for 1 year = 225 + 245.25 = 470.25 ( only when the interest is not per annum )

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