比例升高英文

该大学大一到大三做兼职的学生的比例从10%上升到了15%而大四兼职学生的比例急剧上升到了60%The proportion of freshmen who do part-time job in freshman to junior college rose from 10% to 15% and the proportion of senior part-time students rose sharply to 60%

increase proportionally 或者 increase in proportion这样地道一些

1, As the proportion is increasing正确3,第三人称，要加s, 应为As the proportion increases2,As the proportion increasing表达有误