It can be seen from the two pie charts that females were（图形描述一般用现在时,除非有明确指定过去时间） arrested much less frequently than males.There are only 9% females were arrested.But for males,it dramatic（副词dramaticly） increased to 32%.As for the reasons for these arrestments,there are various.
According to the horizontal bar chat,the reasons of most female arrestments are public drinking and assault（复数）.And in this（both） two aspects,（the nomber of females arrested)is greater than the males'.But in other aspects,such as drink(drunk) driving,breach of public orders and theft,male arrestments are more than female.Especially in the case of drink driving,there are 13 male arrestments more than females.(above all reasons),the number of males arrested is larger than females.
We can conclude that public drinking is the main reason of arrestments (for)both male and female.When comes(coming) to public drinking and assaults,females were arrested more than males.But females were arrested much less frequently than males.
图表描述得还算不错,相信你以后会有更大提高的