Looks like it uses PW1000G which in its most efficient version is 12:1 bypass https://en.wikipedia.org/wiki/Pratt_%26_Whitney_PW1000G#Ultra_high-bypass_version

Looks like it uses PW1000G which in its most efficient version is 12:1 bypass https://en.wikipedia.org/wiki/Pratt_%26_Whitney_PW1000G#Ultra_high-bypass_version https://en.wikipedia.org/wiki/Pratt_%26_Whitney_PW1000G#Ultr... The Trent 1000 on 787 is 10:1.