% join old.txt new.txt | awk '{print $1,"+"($3/$2-1)*100" %"}'
cnt +49.3072 %
dir +40.5945 %
ori +22.4553 %
rel +45.207 %
rev +53.4978 %
snp +112.974 %
dir:cnt +22.6402 %
dir:dir +21.9311 %
dir:rev +38.7318 %
ori:snp +299.459 %
rel:cnt +20.0918 %
rel:dir +9.84252 %
rel:rel +40.4022 %
rel:rev +45.17 %
rev:dir +53.7368 %
rev:rev +52.5188 %
snp:cnt +10.289 %
snp:dir +-98.6901 %
snp:rel +177.137 %
snp:rev +68.7864 %