设这个分数是Y/X,得方程
(Y+16)/(X-166)=3/4
(Y+124)/(X+340)=1/2
解方程得:Y=419, X=746.
原分数是:419/746
验算:(419+16)/(746-166)
=435/580
=3/4
(419+124)/746+340)
=543/1086
=1/2
设这个分数是Y/X,得方程
(Y+16)/(X-166)=3/4
(Y+124)/(X+340)=1/2
解方程得:Y=419, X=746.
原分数是:419/746
验算:(419+16)/(746-166)
=435/580
=3/4
(419+124)/746+340)
=543/1086
=1/2