which proportion can be used to determine what number 15% of 30?
A15/20 = x/100
B15/100 = x/30
C15 / 100 = 30/x
D30/100 = 15/x
A15/20 = x/100
B15/100 = x/30
C15 / 100 = 30/x
D30/100 = 15/x