r = (s2-s1)/s1*100
print(f'小明的成绩从去年的{s1}分提升到了今年的{s2}分,提升了{r:.2f}%')
print('提升了{0:.2f}%'.format(r))
print('提升了%.2f%%'%r)
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r = (s2-s1)/s1*100
print(f'小明的成绩从去年的{s1}分提升到了今年的{s2}分,提升了{r:.2f}%')
print('提升了{0:.2f}%'.format(r))
print('提升了%.2f%%'%r)