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

s1 = 72
s2 = 85
r = 100*(s2-s1)/s1
#print('%f' % r)为什么错误
#print('小明成绩提升了:%f\%' 'r')为什么错误
print("小明的成绩提升了:%.2f%%" % r)

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

-- coding: utf-8 --

s1 = 72 s2 = 85 r = s1/s2 r = r*100 print('%.2f %%' % r )

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

s1 = 72 s2 = 85 r = (s2-s1)/s1 r = r*100 print('%.2f %%' % r )

尴尬症犯了。。。。