Problema Solution
pens are bought at 12 for a rupee and sold at 9 for a rupee find the gain %
Answer provided by our tutors
well, selling something for less than it cost means that the "gain" is actually a loss
the % loss (or "negative gain"!), expressed in percentage (so multiplied by 100) is:
100.(9/12.)
75.
So the rupee is sold for 75% of the value (a loss of 25%).