Question

sunita sold a bangle for rs.4500 and lost 10%. for how much should she have sold to gain 20%

Answer 1

SP = rs. 4500
90/100 of CP = rs. 4500
CP = 4500 * 100/90
      = rs. 5000
20% of rs. 5000 = 20/100 * 5000
                          = 1000
therefore, for gaining 20% she should sell it at rs. 5000 + rs. 1000 = rs. 6000