s1=72
s2=85
r=((s2-s1)/s1*100)
print('hello,{0},成绩提升了{1:.1f}%'.format('小明',r))
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末宁7814
s1=72
s2=85
r=((s2-s1)/s1*100)
print('hello,{0},成绩提升了{1:.1f}%'.format('小明',r))