Kerala Finance Minister K N Balagopal has called for a review of the central-state tax sharing ratio of the Goods and Services Tax (GST), and said that 60 per cent should go to the states, whereas it is shared equally now. Currently, the ratio is 50:50 and it should be changed to 40:60 in favour of the states, the minister said in the GST Council meeting held in New Delhi on Saturday, according to a statement issued by his office here on Sunday.