It is 20%.
Typical composition of biogasMatter %Methane, CH450-75Carbon dioxide, CO225-50Nitrogen, N20-10Hydrogen, H20-1Hydrogen sulfide, H2S0-3Oxygen, O20-2
They both are made only of Carbon, Hydrogen and Oxygen. Starch has more of each, regular sugars have less (but all in a 1:2:1 ratio - ie: glucose is C6 H12 O6, "starch" can be C20H40 O20).
(85 percent + 79 percent + 92 percent + 100 percent)/4 = 89 percent
32 percent percent percent = 3.2 × 10-5
30 percent of 20 percent of 150 percent = 0.09
(75 percent) percent of 42 = 31.5%
68 percent of 50 percent is 34 percent.
75 percent of 300 percent is 225 percent.
75 percent of 21 percent is 15.75 percent.
44 percent of 75 percent is 33 percent.
76 percent of 25 percent is 19 percent.
25 percent of 65 percent is 16.25 percent