s1 = 72 s2 = 85 r = (s2 - s1) / s1 print('Hello, 小明, 成绩提升了{0:.1f}%'.format(r * 100))
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w小王z
s1 = 72 s2 = 85 r = (s2 - s1) / s1 print('Hello, 小明, 成绩提升了{0:.1f}%'.format(r * 100))