Question

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

 

Answer 1

`512-400=112\\\\ (112)/(400) \cdot 100\%= (112)/(4)\%=28\%\\ \\ 28 \% : 14\%=2\\ \\Ans. \ 2\ years`

Answer 2

`512\$-400\$=112\$\\\\(112\$)/(400\$)\cdot100\%=0,28\cdot100\%=28\%\\\\28:14=2-years`