The amount of interest earned on an investment of C, for y years at r per cent is C*y*r/100.
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There is simple interest and there is compound interest but this question is the first that I have heard of a simple compound interest.
It is interest on simply the original capital. After the first period, compound interest involves interest on the interest earned in previous periods and soit not simple.
$494.34 Interest= principal amount * time* simple interest %
Simple interest = 1000 * 5/100 * 3 = 150
At what rate of simple interest will the interest on Rs.925 be two-fifth of it in 8 years?