Hi Shruti,

 This year a total of 1,45,386 aspirant appeared for the JEE B.Arch Examination. Therefore, basing upon the total number of aspirants the formula for calculating your rank would be ([100-your percentile] x 145386)/100. Therefore, approximately your rank will be around 26,751.
Considering the rank of 26,751, chances of getting a college is very bleak. However, depending upon your category and state quota, you can decide your yourself after having a look at last year's allotment list with opening and closing rank. Use the link given here (https://engineering.careers360.com/articles/jee-main-cutoff-for-b-arch-b-planning#).

To clear any doubts or to know more about JEE B.Arch Results, keep reading Careers 360 using the link given below: 

Https://engineering.careers360.com/articles/jee-main-paper-2-result

Thanks,