Question

急！懂英文和数学的来！！百分数问题。

There are 75 passengers in a double-decker,and 40% of them are on the upper deck.
(a)How many passengers are there on the lower deck?
(b)If 30% of the passengers on the upper deck are children,how many chidren are there on the upper deck?

Answer 1

读懂题目就可以。它说：有75个乘客在一艘双层甲板船上，其中40%的人在上层甲板。
（a）有多少乘客在下层甲板？用75乘60%
（b）如果30%的上层甲板上的乘客是小孩，那么有多少小孩在上层甲板？用75乘40%再乘30%

Answer 2

【1】
75除以100=0.75【人】0.75乘以六十=45【人】
【2】
75除以100=0.75【人】0.75乘以40=30【人】30除以100=0.3【人】 0.3乘以三十=9【人】

Answer 3

a 75 *(1-40%)=45
There are 45 passengers are there on the lower deck
b 75*40%*30%=9
There are 9 chidren are there on the upper deck

Answer 4

There are 45 passengers on the lower deck. And there are 9 children on the upper deck.