r = (s2-s1)/s1*100
print('成绩提高了:%.1f%%' % r)
print('成绩提高了:{0:.1f}%'.format(r))
print(f'成绩提高了:{r:.1f}%')
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r = (s2-s1)/s1*100
print('成绩提高了:%.1f%%' % r)
print('成绩提高了:{0:.1f}%'.format(r))
print(f'成绩提高了:{r:.1f}%')