Question

after selling a watch for rs 1550 a man gets 10℅ loss. then at how many rupees he sell to get 15 ℅ profit?

Answer 1

loss=10%
SP=1550
CP=SP/(1-(loss/100))
CP=1550/(1-(10/100))
CP=1550/(9/10)
CP=1550*(10/9)
CP=172.22*10
CP=1722.22
To gain 15% profit ,
SP=CP*(1+(profit/100))
SP=1722.22*115/100
SP=1980.553

Answer 2

Find the cost price:

Loss = 10%

Selling Price = 100 - 10 = 90%

Selling Price = Rs 1550

90% = Rs 1550

1% = 1550 ÷ 90 = 155/9

100% = 155/9 x 100 = Rs 1722.22

Find the profit:

15% profit = 15% x 1722.22 = Rs 258.33

Find the new selling price:

Profit = Rs 258.33

Selling Price = 1722.22 + 258.33 = Rs 1980.56

Answer:  He should sell it at Rs 1980.56