(6.25×8/9-11/6)×2/3
=(25/4×8/9-11/6)×2/3
=(25×2/9-11/6)×2/3
=(50/9-11/6)×2/3
=50/9×2/3-11/6×2/3
=100/27-11/9
=100/27-33/27
=67/27
(6.25×8/9-11/6)×2/3
=(25/4×8/9-11/6)×2/3
=(25×2/9-11/6)×2/3
=(50/9-11/6)×2/3
=50/9×2/3-11/6×2/3
=100/27-11/9
=100/27-33/27
=67/27