Grade scale
100-90=A
89-80=B
79-70=C
69-60=D
59-0=F
So a 64 is a D
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Grade average of 89 percent and 93 percent averages 91% or an A-.
Expressed as a percentage, 36/64 x 100 = 56.25 percent.
135% of 64 = 86.4
64+16 = 80
64% of 1,107= 64% * 1107= 0.64 * 1107= 708.48