In the article the figures of 18% vs 36% are mentioned rather than 15% vs 97%.
I'd like to point out that there is a high possibility that there is an upward trend in reservation category cutoffs. And if it is indeed the case then I'd be the happiest.
As for my other claim, please see [1] and [2].
1. https://www.theyouth.in/2018/06/16/candidate-who-scored-minu...
2. https://www.india.com/education/zero-cut-off-maths-phd-inter...