Problema Solution
A trader bought a watch and sold it at 30% more than its original cost. How much did the trader earn if the original cost of the watch was P?
Answer provided by our tutors
original cost = P
sales price = P + 0.30P= 1.30P
profit = sales price - original cost
profit = 1.30P - P
profit = 0.30P
the trader earned 0.30P.