a = '{0}的成绩从去年的{1}分提升到了今年的{2}分,提高了{3:.1f}%'.format('小明', 72, 85, (85-72)/72 * 100)
b = '%s的成绩从去年的%d分提升到了今年的%d分,提高了%.1f%%' % ('小明', 72, 85, (85-72)/72 * 100)
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