Question

A man sold a table for Rs2250 and gained one-ninth of its cost price. Find:

The cost price of the table and the gain percent earned by the man

Answer 1

Selling Price = SP
Cost Price = CP
Gain % = g%

gain = (1/9) CP
SP -gain = CP
2250= (9CP + 1CP) / 9
2250 x 9 = 10 x CP
(2250 x 9 ) / 10= CP
2025=CP

gain = 2250-2025 = 225

gain% = (gain/CP) x 100
gain % = (225/2025) x 100
gain % = 0.1111111..... x 100 = 11.1111 
~11.1%

Hope it helps :)