用英语回答几个问题.

题目

用英语回答几个问题.
1.A student named Tom is trying to save money from his summer job.In August,he earned $100 by washing dishes in a restaurant.He saved 25% of that money.How much did Tom save?
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2.Many stores have some discount items.Tom notices that a store has a bag on sale.The original price of the bag is $100.On that day,the price is reduced 40%.How much money does Tom need to pay for the bag?
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3.After buying the bag,what percent of the $100 that he earned does Tom have left for other expenses?
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不要乱答啊...
连词成句：
they did catch，the thief
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答案

1.25 dollors
2.60 dollors(商家减价百分之四十）
3.15%(意思是汤姆存完钱,买完包,剩下的钱占$100的百分之几）
连词成句
Did they catch the thief?(他们抓到贼了吗?）