Percentage of cluster analysis

GROMACS version: 5.1.4
GROMACS modification: Yes/No
Dear all,
We are doing the cluster analysis by gmx cluster command and there are formation of cluster.log and cluster.pdb file with number of cluster founds 6 with RMSD cutoff 0.7 nm, and we found that number of cluster are decreasing with decrease in cutoff from 1.2 nm to 0.7 nm by 1. I am little bit confusing about the selection of cutoff and anybody give me the idea about writing the percentage of each cluster.
Please suggest me regarding this


about writing the percentage of each cluster

you can look at the ratio of number of structures in one cluster on to the total number of structure in the trajectory. That provides the % of structures in your sampling

Best regards

thank you for the reply