Legally allowed limit to increase rent during rental agreeme

Hi,

Please let me know the legally allowed limit to increase rent during rental agreement renewal in Bangalore. My landlord want to increase the rent by 35%(Rs. 5000/-) as part of the renewal and the previous agreement quotes only 5%. This is completely unfair and I need some help in taking this up. I infact agreed to pay upto 20% increase, but he is not accepting.

Any help on this would be greatly appreciated.

Regards,

-Suren.