甲乙丙三个数的平均数是24,甲+乙+丙 = 24x3 = 72
已知丙为16,甲+乙 = 72 -16 = 56
甲数比乙数大8,甲-乙 = 8
甲 = (56+8)/2 = 28+4 = 32
乙= 56 - 32 =24
24/ 32 = 3 /4
乙数是甲数的（75）％