#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#算成绩提升百分比
a1=72
a2=85
r= (a2-a1)/a1*100
print('小明成绩提升%.2f%%'%(r))
print('小明成绩提升{0:.2f}%'.format(r))
print(f'小明成绩提升{r:.2f}%')
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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#算成绩提升百分比
a1=72
a2=85
r= (a2-a1)/a1*100
print('小明成绩提升%.2f%%'%(r))
print('小明成绩提升{0:.2f}%'.format(r))
print(f'小明成绩提升{r:.2f}%')