=6分之59×4分之17+2分之9×6分之1
=24分之1003+12分之9
=24分之1003+24分之18
=24分之102122×4分之3-25×75%-7×0.7522×4分之3-25×75%-7×0.75=22×0.75-25×0.75-7×0.75=（22-25-7）×0.75=-10×0.75= -7.5