Question Number 27016 by sirigidiravikumar@gmail.com last updated on 01/Jan/18 | ||
$${the}\:{intrest}\:{on}\:{surtain}\:{sum}\:{of}\:{money}\:{at}\:{the}\: \\ $$$${end}\:{of}\:\mathrm{6}.\mathrm{25}\:{year}\:{was}\:\frac{\mathrm{5}}{\mathrm{16}}\:{of}\:{the}\:{itself}.{what}\:{is}\:{the} \\ $$$${the}\:{rate}\:{percent}? \\ $$ | ||
Commented by Rasheed.Sindhi last updated on 07/Jan/18 | ||
$$\mathrm{Let}\:\mathrm{the}\:\mathrm{principal}\:\mathrm{is}\:\:\:\:\:\mathrm{x} \\ $$$$\mathrm{Interest}\:=\:\frac{\mathrm{5x}}{\mathrm{16}} \\ $$$$\mathrm{Per}\:\mathrm{year}\:\mathrm{interest}=\frac{\mathrm{5x}}{\mathrm{16}}/\frac{\mathrm{25}}{\mathrm{6}}=\frac{\mathrm{5x}}{\mathrm{24}} \\ $$$$\begin{pmatrix}{}&{\mathrm{PerYear}}&{}&{}&{}\\{\mathrm{interest}}&{}&{}&{}&{\mathrm{principal}}\\{\:\:\:\:\:\:\:\:\frac{\mathrm{5x}}{\mathrm{24}}\:\:\:}&{}&{}&{}&{\:\:\:\:\:\:\:\:\mathrm{x}}\\{\:\:\:\:\:\:\:\:?}&{}&{}&{}&{\:\:\:\:\:\:\mathrm{100}}\end{pmatrix} \\ $$$$\:\:\:\:\:\:\:\:\frac{?}{\mathrm{5x}/\mathrm{24}}=\frac{\mathrm{100}}{\mathrm{x}} \\ $$$$\:\:\:\:\:\:\:\:\:\:\:\:\:?=\frac{\mathrm{100}}{\mathrm{x}}×\frac{\mathrm{5x}}{\mathrm{24}}=\frac{\mathrm{125}}{\mathrm{6}}\% \\ $$$$ \\ $$ | ||