r = (s2-s1)/s1*100
print('%s成绩提升:%.1f%%' % ('小明',r))
print('{0}成绩提升了:{1:.1f}%'.format('小明',r))
print(f'小明成绩提升了：{r:.1f}%')
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里昂tcxy
r = (s2-s1)/s1*100
print('%s成绩提升:%.1f%%' % ('小明',r))
print('{0}成绩提升了:{1:.1f}%'.format('小明',r))
print(f'小明成绩提升了：{r:.1f}%')