# -*- coding: utf-8 -*-
s1=72
s2=85
r=s2/s1-1
print('%.1f'%r)
订正版
r=r*100
print('进步了%%%.1f'%r)
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zqdllym
# -*- coding: utf-8 -*-
s1=72
s2=85
r=s2/s1-1
print('%.1f'%r)