Question

The marked price of a watch is rs 1600.if it is sold at a discount of 10% the profit is rs 80 what is the cost price of the watch?

Answer 1

1600*(90/100)*[(100-x)/100] = 1224, or

100-x = 1224*100*100/(1600*90) = 85, or

x = 100–85 = 15%.

hope it helps you dear

Check: 1600*(90/100)*(85/100) = 1224. Correct.

x = 15 %