If a is increased by 25% and b is decreased by 25%, the resulting numbers will be equal. What is the ratio of a to b?

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问题 If a is increased by 25% and b is decreased by 25%, the resulting numbers will be equal. What is the ratio of a to b?

选项 A、 
B、 
C、 
D、 
E、 

答案A

解析
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