Respuesta :

he has been reading for 20days

The question really means, how many 1/6ths are there in 7/8?  So you divide 7/8 by 1/6: 7       1         7    6        42--  ÷  --    =  -- * --   =  ---   = 5 2/8 = 5 1/48       6         8    1         8 So he's been reading for 5 1/4 days. i hope i helped u :-0