s1=72
s2=85
r1=(s2 - s1)/s1*100
print('小明的成绩提升了 %.1f %%' % r1)
print('小明的成绩提升了{:.1f}%'.format(r1))
print(f'小明的成绩提升了{r1:.1f}%')
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s1=72
s2=85
r1=(s2 - s1)/s1*100
print('小明的成绩提升了 %.1f %%' % r1)
print('小明的成绩提升了{:.1f}%'.format(r1))
print(f'小明的成绩提升了{r1:.1f}%')