Interest on FD calculation

I had deposited Rs 25945 In SBI with a intrest rate of 9.25% with inrest payable monthly on 28th march ,with a hope of receivin an intres of rs 200 monthly. i.e 25945 x 9.25% /12mnths .

But on 28th april i had received rs 198 only .

Where did my caculation went wrong ? even if we take days for caculating there is 31 days so 25945 x 9.25% x 31/365=204

Please help