Study the following graph and answer the question.
Profit = Income - Expenditure
In 2021, the income of the company over 2020 increases by the same percentage as in 2019 over its preceding year, expenditure in 2021 increases by 20% over 2020, then the profit as a percent of income in 2021 is closest to:
1
28.5%
2
40.6%
3
42.8%
4
33.3%