两道英文数学题,很简单我不知道我的理解对不,所以想看看大家的过程和结果和我一样不1.In a school, of the students are girls. A year later, the number of girls in the school is increased by and the number of boys is increased by . Find the percentage increase in the total number of students.2.The marked price of a watch is 40% above its cost. If the watch is sold at a discount of 30%, find the percentage gain or loss.
两道英文数学题,很简单
我不知道我的理解对不,所以想看看大家的过程和结果和我一样不
1.In a school, of the students are girls. A year later, the number of girls in the school is increased by and the number of boys is increased by . Find the percentage increase in the total number of students.
2.The marked price of a watch is 40% above its cost. If the watch is sold at a discount of 30%, find the percentage gain or loss.
第一题没数字没得计
1.In a school,〔 〕of the students are girls. A year later, the number of girls in the school is increased by〔 〕and the number of boys is increased by〔〕 . Find the percentage increase in the total number of students
2. 〔1+40%〕×〔1 - 30%〕＝98%
100% - 98%＝ 2%
Ans：loss, loss 2%
1、在一所学校里,女生占学生总数的(?).一年后,这所学校的女生的数量增加了(?),同时男生的数量增加了(?).请问学生总数的增幅是多少?题目没有给出数值（上边的?处）,如果以xyz表示上述缺少的数值,可以确定计算式.没原...