回答編集履歴
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fix context
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@@ -1,5 +1,6 @@
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[丸め誤差](https://www.google.com/search?q=%E4%B8%B8%E3%82%81%E8%AA%A4%E5%B7%AE)を参照してください．
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以下対処例
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```python
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from fractions import Fraction
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fix ans
answer
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@@ -1,1 +1,14 @@
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[丸め誤差](https://www.google.com/search?q=%E4%B8%B8%E3%82%81%E8%AA%A4%E5%B7%AE)を参照してください．
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[丸め誤差](https://www.google.com/search?q=%E4%B8%B8%E3%82%81%E8%AA%A4%E5%B7%AE)を参照してください．
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```python
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from fractions import Fraction
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x = 151.67168989437898493880
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_x = Fraction(str(x)[:7])
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_sell1 = _x - Fraction(2, 100)
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_sell2 = _x + Fraction(3, 100)
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print(_x, _sell1, _sell2, sep=', ') # 151671/1000, 151651/1000, 151701/1000
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print(float(_x), float(_sell1), float(_sell2), sep=', ') # 151.671, 151.651, 151.701
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```
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