After allowing a discount of 20% on the marked price of a lamp a trader loses 10%.by what percentage is the marked price above the cost price

Asked by ajayrath7 | 12th Nov, 2017, 09:30: PM

Expert Answer:

begin mathsize 16px style Let space the space straight C. straight P. space of space the space lamp space be space Rs.100
Loss equals 10 percent sign space of space straight C. straight P. space equals space Rs.10
therefore space straight S. straight P. equals straight C. straight P. negative Loss equals Rs.100 minus Rs.10 equals Rs.90
The space trader space allows space straight a space discount space of space 20 percent sign.
This space means space that space when space the space straight M. straight P. space is space Rs.100 comma space the space straight S. straight P. space will space be space Rs. space 80
Now comma space space
If space Rs. space 80 space is space the space straight S. straight P. comma space then space straight M. straight P. equals Rs.100
If space Re. space 1 space is space the space straight S. straight P. comma space then space straight M. straight P. equals space Rs. space 100 over 80
If space Rs. space 90 space is space the space straight S. straight P. comma space then space straight M. straight P. space equals space Rs. space open parentheses 100 over 80 cross times 90 close parentheses equals Rs.112.50
Hence comma space the space trader space marks space his space good space at space 12.5 percent sign space above space the space cost space price. end style

Answered by  | 20th Dec, 2017, 11:24: AM