What is wrong?

Hi Last month when karnataka election results came i found strange thing. In the poll only 60% has voted in that 30% of people wanted B.J.P to became the goverment as of M.L.As concern.That is B.J.P has 112 M.L.A this is fine but in the overall percentage of votes congree has34% while B.J.P has only 30%. This is the thing i want to ask to our constitution see in 100 only 60 voted in that 34 wants congress to rule but B.J.P is ruling.What is this system we want to change this so that everybodys desire can make the goverment