Question

Find the gain or loss per cent when :

(i) C.P =Rs. 620 and S.P =Rs. 713

(ii) C.P =Rs. 675 and S.P =Rs. 630

(iii) C.P =Rs. 345 and S.P =Rs. 372.60

(iv) C.P =Rs. 80 and S.P =Rs. 76.80

Answer 1

$\left(i\right))\text{C.P =Rs.620}\text{S.P =Rs.713}\text{Gain =S.P -C.P=Rs.713-Rs.620}=Rs.93\text{Gain}\%=\frac{\text{Gain}\times 100}{C.P}=\frac{93\times 100}{620}=15\%(ii\left)\right)\text{C.P =Rs.675}\text{S.P =Rs.630}\text{Loss =C.P -S.P=Rs.675-Rs.630}=Rs.45\text{Loss}\%=\frac{\text{Loss}\times 100}{C.P}=\frac{45\times 100}{675}=\frac{20}{3}=6\frac{2}{3}\%\left(iii\right))\text{C.P =Rs.345}\text{S.P =Rs.372.60}\therefore \text{Gain =S.P - C.P=Rs.372.60-Rs.345}=Rs.27.60\text{Gain}\%=\frac{\text{Gain}\times 100}{C.P}=\frac{27.60\times 100}{345}=\frac{2760\times 100}{100\times 345}=8\%(iv\left)\right)\text{C.P =Rs.80}\text{S.P =Rs.76.80}\therefore \text{Loss =C.P - S.P=Rs.80-Rs.76.80}=Rs.3.20\text{Loss}\%=\frac{\text{Loss}\times 100}{C.P}=\frac{3.20\times 100}{80}=\frac{320\times 100}{100\times 80}=4\%\text{Ans.}$