Question

The difference between the simple interest and compound interest on a certain principle at 12.5 percent per annum for 2 years is rupees 156.25 find the sum

Answer 1

$\frac{12.5 \times 2 \times 156.5}{100} = 39.125 \\ 156(1 + \frac{12.5}{100} )2 \\ 156.5 \times \frac{112.5}{100} \times \frac{112.5}{100} \\ 198.07 - 156.5 = 41.57$