Alice's take-home pay last year was the same each month, and she saved the same fraction of her take-home pay each month. The total amount of money that she had saved at the end of the year was 3 times the amount of that portion of her monthly take-home pay that she did not save. If all the money that she saved last year was from her take-home pay, what fraction of her take-home pay did she save each month? highlight部分看不懂，（年底攒的钱是每月没存的那部分钱占月收入比例的3倍？太晕了！），谁能帮忙翻译下？谢了。 | 
