Question

In what time will $400 amount to $512 if the simple interest is calculated at 14% per annum?  

Answer 1

$512-400=112\\\\ \frac{112}{400} \cdot 100\%= \frac{112}{4}\%=28\%\\ \\ 28 \% : 14\%=2\\ \\Ans. \ 2\ years$

Answer 2

$512\ -400\ =112\ \\\\\frac{112\ }{400\ }\cdot100\%=0,28\cdot100\%=28\%\\\\28:14=2-years$