108 x 100/75 = 108 x 1.25 = 144
108 is 75% of 144.
Hope this helps :)
6. C just find the slope of the line formula is y2-y1/x2-x1 =216-128/27-16
2/24 and 3/36 are both equivalent
6 for the two bases = 12
6 x 2 = 12 for the 4 faces = 48
48+12 = 60 cm^2