Weights of two friends Rehan and Shahid are in the ratio of 4:5. Rehan’s weight increases by 20% and the total weight of Rehan and Shahid together becomes 82.8 kg with an increase of 25%. By what percent did the weight of Shahid increase?
1
12.5%
2
17.5%
3
29%
4
21%
5
None of these