问题 解答题 把下列百分数化成小数或整数.7.4%=303%=15.6%=3.9%=42.3%= 答案 7.4%=0.074;303%=3.03;15.6%=0.156;3.9%=0.039;42.3%=0.423.故答案为:0.047,3.03,0.156,0.039,0.423.