Question

By selling a music system for 9000 rahul incurred a loss of 10% .had he sold it at 12000,what would be his loass or profit percent

Answer 1

sp1 = 9000
loss = 10%
so cp = (sp1 × 100)/(100 - loss%)
= (9000 × 100)/(100 - 10)
= (9000 × 100)/90
= 100 × 100 = 10000
now
cp = 10000
sp = 12000
since sp greater than cp
so profit = 12000 - 10000 = 2000
therefore profit % = (profit × 100)/(cp)
= (2000 × 100)/10000
= 2 × 10
= 20%