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小小小美同志

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

s1 = 72

s2 = 85

r = (s1-s2)/s1*100

print('小明的成绩提升了%.1f%%' % r)

小小小美同志

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

错了，是

r = (s1-s2)/s1*100

print('小明的成绩提升了%.1f%%' % r)

小小小美同志

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

错了是

r = (s2-s1)/s1*100

print('小明的成绩提升了%.1f%%' % r)

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