Hard
The price of mango is diminishing by 15% and its demand increases by 20%. What is the resultant profit/loss?
Explanation
Explanation
Net effect = -15 + 20 + (-15x20/100) = 5 - 3 = 2, meaning a net 2% profit (using the standard successive percentage change formula: a+b+ab/100).
PRO TIP
Re-check your working by substituting the answer back into the original question.