Improve formula

Games saved : 523688000 / 1600000000 ( 32.7305% )
Patches passed (without stopping condition) : 13477 / 100000 ( 13.477% )
Patches passed (with stopping condition )   : 13259 / 100000 ( 13.259% )
Good Patch discard rate : 218 / 13477 ( 1.61757% )