Bala sold an article for N6,900.00 and made a profit of 15%. If he sold it for N6,600, he would make a
profit of 13%
loss of 12%
profit of 10%
loss of 5%
\[\begin{align} & \text{ }percent\text{ }profit=\frac{profit}{cost price}\times 100percent \\ & 0.15=\frac{profit}{cost price} \\ & profit=0.15[cost price\text{ }\!\!]\!\!\text{ } \\ & selling\text{ price}-\text{cost price }=0.15[cost price\text{ }\!\!]\!\!\text{ } \\ & selling price=cost\text{ }price+0.15[cost price\text{ }\!\!]\!\!\text{ } \\ & selling price\text{ =1}\text{.15 }\!\![\!\!\text{ cost price }\!\!]\!\!\text{ } \\ & \text{1}\text{.15 }\!\![\!\!\text{ cost price }\!\!]\!\!\text{ }=9600 \\ & costprice=\frac{6900}{1.15}=6000 \\ & \text{Selling at 6600} \\ & percentage\text{ }profit=\frac{6600-6000}{6000}\times 100percent=10percent \\ & profit\text{ of 10 }percent \\\end{align}\]