r = (s2-s1)/s1*100 print('小明成绩提升了:''%.1f %%' % r)
r = (s2-s1)/s1*100 print('小明成绩提升了:%.1f %%' % r)
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永远都睡得着
r = (s2-s1)/s1*100 print('小明成绩提升了:''%.1f %%' % r)