英语翻译The sum of four test scores is 156.If another test score is added,the average becomes 35.What is the test score expressed as a percentage if the test was out of 50?看不懂题,实在不明白题的意思.求高手帮忙翻译成中文,

英语翻译
The sum of four test scores is 156.If another test score is added,the average becomes 35.What is the test score expressed as a percentage if the test was out of 50?
看不懂题,实在不明白题的意思.求高手帮忙翻译成中文,

四次考试的总分是156.如果加入另一次考试的分数,那么平均分为35.如果这次测试总分是50,那么这次考试分数是白分之多少?
...out of 50 是算成绩经常用到表达,50是满分的意思,
比如 20/50,就是满分50,考了20分,那么放在百分制就是40/100,也就是说50分总分,考了20分,相当于满分100分,考了40分
这个题就是问这个,平均35分,满分50,那么就是70/100,也就是70%

四次考试的总分是156. 如果另一次考试的分数被加进去，平均分为35. 如果这次测试是50？，用百分数该如何表达。