For which of the following years the percentage of rise/fall in profit from the previous year was the maximum for A Ltd?

Percentage rise or fall in profit of A for a given year from previous year = |((Profit of A for the given year - profit of A for the previous year)/(profit of A for the previous year))|*100

Profit of A for year 2011 = Revenue of A in 2011 - expense of A in 2011 = 120-105       (in thousands)

Profit of A for year 2012 = 165-185 = -20       (in thousands)

Profit of A for year 2013 = 135-100 = 35        (in thousands)

Profit of A for year 2014 = 180-120 = 60        (in thousands)

Profit of A for year 2015 = 150-110 = 40        (in thousands)

 Percentage rise or fall in profit of A for year 2012 = |((profit of A for year 2012 - profit of A for year 2011)/(profit of A for year 2011))|*100

                                                                               = |((-20-15)/15)|*100 = 233.33

Similarly, 

for year 2013, Percentage rise or fall in profit of A = |((35- (-20) )/-20)|*100 = 275

for year 2014, Percentage rise or fall in profit of A = |((60-35)/35)|*100 = 71.43

for year 2015, Percentage rise or fall in profit of A = |((40-60)/60)|*100 = 33.33

Here, rise in profit of A for the year 2013 is highest.

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