What is the average percentage increase in the profit of Company B in the years 2007 and 2009 together?
40
45
38
42
Required average = 40+502=902=45%
What is the approximate average per cent increase in the profit of Company A over all the years together?
What is the ratio of percentage increase in the profit of company A in the year 2008 to the percentage increase in the profit of company B in the same year?