Question Number 55587 by byaw last updated on 27/Feb/19
$$\mathrm{If}\:\mathrm{12\%}\:\mathrm{of}\:\mathrm{a}\:\mathrm{number}\:\mathrm{is}\:\mathrm{equal}\:\mathrm{to}\:{s}, \\ $$$$\mathrm{what}\:\mathrm{is}\:\mathrm{the}\:{e\%}\:\mathrm{of}\:{s}? \\ $$$$\mathrm{A}.\:\frac{{es}}{\mathrm{12}} \\ $$$$\mathrm{B}.\:\frac{{es}}{\mathrm{88}} \\ $$$$\mathrm{C}.\:\frac{\mathrm{12}{s}}{{e}} \\ $$$$\mathrm{D}.\:\frac{\mathrm{12}{e}}{{s}} \\ $$
Answered by peter frank last updated on 27/Feb/19
$$\mathrm{12\%}\rightarrow{s} \\ $$$${e\%}\rightarrow{x} \\ $$$${x}=\frac{{es}}{\mathrm{12}} \\ $$
Answered by tanmay.chaudhury50@gmail.com last updated on 27/Feb/19
$${x}×\frac{\mathrm{12}}{\mathrm{100}}={s} \\ $$$${x}=\frac{\mathrm{100}{s}}{\mathrm{12}} \\ $$$${e\%of}\:{s} \\ $$$$=\frac{{e}}{\mathrm{100}}×{s} \\ $$$${but}\:{e\%}\:{of}\:{x} \\ $$$$=\frac{{e}}{\mathrm{100}}×\frac{\mathrm{100}{s}}{\mathrm{12}} \\ $$$$=\frac{{es}}{\mathrm{12}} \\ $$$${re}\:{check}\:{question}… \\ $$