Answer:
To determine the marginal tax rate that the businessman paid in 2018, we must obtain the percentage that 6,300 represents in a total of 220,000. This is obtained through a cross multiplication:
220,000 = 100
6,300 = X
(6,300 x 100) / 220,000 = X
2.86 = X
As we can see, the tax rate that this businessman had to pay in 2018 was 2.86% of his income.
Now, in 2017, having obtained a profit of $ 200,000, he paid taxes of $ 5,200:
200,000 = 100
5,200 = X
(5,200 x 100) / 200,000 = X
2.6 = X
Therefore, in 2017 he paid taxes for 2.6% of his earnings.
As we can see, his marginal tax rate increased from 2.6% to 2.86% due to higher profits, which is a situation of progressive taxation.