3,-1,315,0,-3.14,-21/7,-12.9,400%,81/9,5.15115.里哪个是分数?

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3,-1,315,0,-3.14,-21/7,-12.9,400%,81/9,5.15115.里哪个是分数?
3,-1,315,0,-3.14,-21/7,-12.9,400%,81/9,5.15115.里哪个是分数?

3,-1,315,0,-3.14,-21/7,-12.9,400%,81/9,5.15115.里哪个是分数?
-21/7、81/9为分数