# -*- coding: utf-8 -*-

s1 = 72

s2 = 85

r = ((s2-s1)/s1) * 100

#占位符

print('小明成绩提升了%.1f%%' % r)

#format

print('小明成绩提升了{0:.1f}%'.format(r))

#f-string

print(f'小明成绩提升了{r:.1f}%')