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格式化字符带入的值若是计算式，要记得打括号（即使只有一个

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萌萌小喵姐

#1 Created at ... [Delete] [Delete and Lock User]

s1 = float(input('Please enter last year\'s grades:')) s2 = float(input('Please enter this year\'s grades:')) print('growth rate :%.1f%%' % ((s2-s1)/s2*100))

去一去闲

#2 Created at ... [Delete] [Delete and Lock User]

提升的百分点应该是除以s1而不是s2

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