The Power
The highest magnification would be achieved by using the 43x objective lens with the 10x eyepiece lens, resulting in a total magnification of 430x (43 x 10 = 430).
lower power= 20 x 10= 200x higher power= 20 x 43= 860x
430x.25=107.5
The systematic order of properly using a microscope starts with the handling. You should carry it with both hands with one hand supporting the base. When you put the microscope down, put your specimen on the slide and fasten it. Look through the eye piece and adjust the lens as low as possible but without touching the slide.