hey sunil,

Yes you can get admission in DU with 90%. But Firstly, DU doesn't require your total aggregate marks but your best four subject marks. You need to calculate your best four % taking the best 4 subjects you scored highest. Next the courses you want to pursue also matters. If you change  your stream there will be a deduction of 2% in your percentage. If you belong to general category it would be difficult for to get good colleges of du as the percentage always be high for them. But you may get the south and off campus colleges for sure. If you belong to any reserved category it won't take much time for you to get good colleges.

Hope this helps. 

 Do ask your further query.

Good luck!