Hi Geethamurali,
Congratulations for getting a good score in your +2 .
Sastra university demands for a minimum +2 percentage of 98% to give a seat. Though you have a pretty good percentage it will not be enough for you to get a seat in Australia university .
Apart from Sastra, there are also many other good engineering colleges that don't demand such high percentage . May be you can give them a try to those colleges also.
Hope the information was helpful
All the very best
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