1/3+2/15+2/35+1/63+7/99
=5/15+2/15+2/35+1/63+7/99
=7/15+2/35+1/63+7/99
=49/105+6/105+1/63+7/99
=55/105+1/63+7/99
=11/21+1/63+7/99
=33/63+1/63+7/99
=34/63+7/99
=374/693+49/693
=423/693
=47/77
1/3+2/15+2/35+1/63+7/99
=5/15+2/15+2/35+1/63+7/99
=7/15+2/35+1/63+7/99
=49/105+6/105+1/63+7/99
=55/105+1/63+7/99
=11/21+1/63+7/99
=33/63+1/63+7/99
=34/63+7/99
=374/693+49/693
=423/693
=47/77