(1)300+400+600+700=2000 (ten thousand yuan), 2000÷ 12= 166 2 3 (ten thousand yuan). A: The total annual profit is 20 million yuan. Average monthly profit1662,300 yuan. (2) The broken-line statistical chart shows that the profit increased rapidly in the third quarter, which was July, August and September, so the profit increased fastest in July, August and September. (3) 300 ÷ 2000 = 65,438+05%, 400 ÷ .700 ÷ 2000 = 35%. The mapping is as follows: (4)(400-300)÷300, =1. The profit in the third quarter is 100% higher than that in the first quarter, so the answer is: 2000, 16623, 33.3, 16.7, 100.