4+15+25+5=494/49=8.16%,8.16%*360=2915/49=30.61%,30.61%*360=11025/49=51.02%,51.02%*360=1845/49=10.20%,10.20%*360=37年龄 13岁 14岁 15岁 16岁分别占扇形图度数为29,110,184,37