| 8 | 1 28 1 31 | | | | 300 % | | 2 1 2 4 | | | | 200 % | | = ÷ 300 % | = ÷ 200 % | = 365 － 104 ÷ 12 = 21.75 | 5000 = 5000 ÷ 21.75 300 % | ≈689.66 = 5000 ÷ 21 . 75 200 %≈ 459.77 | 8 689.66 4 + 459.77 4 = 4597. | 72 | |