问题: 数學問題
Christ gets $1800 pocket money a month.He spends $1440 each month and saves the rest of his pocket month?
(a) What percentage of Christ's earnings does he save each month?
(b) What percentage of his monthly saving?
解答:
(a)1440/1800=80%
(b))(1800-1440)/1800=360/1800=20%
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