# -*- coding: utf-8 -*-
s1 = 72
s2 = 85
r =( s2-s1)/s1*100
print('%.1f%%' % r)
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Kathryn加油呀
# -*- coding: utf-8 -*-
s1 = 72
s2 = 85
r =( s2-s1)/s1*100
print('%.1f%%' % r)