Question 154427
2/5 is the same as 6/15


if 1/7 of the remaining stalks were thrown away leaving 6/15,
__ then the remaining stalks must have been 7/15
__ 1/7 of 7/15 is 1/15, 7/15 less 1/15 is 6/15 or 2/5


if 7/15 were remaining, then 8/15 were sold
__ 8/15 is 80, so 1/15 is 10


there are 6/15 left, so that is 60 left