This is done by varying the time of fermentation after the desired microorganism was added to the solution. The first sample was kept for three days fermentation, which is the standard fermentation time. Another two samples was kept for five and seven days. Three sample data are given in Table 04. We got the highest ethanol percentage at the solution of seven days fermentation. This caused because of more fermentation time the microorganism gets more time to increase its concentration through the solution. As the concentration of microorganism is increased, so all of the fermentable sugar can convert to ethanol. As a whole ethanol percentage is increase. Graphical presentation of those data is given in Figure 04.