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It is rational. You can write its decimal part as 7,010,010,001/10,000,000,000. Add 40,000,000,000/10,000,000,000 to that and you get 47,010,010,001/10,000,000,000, a very ugly fraction that doesn't reduce. But hey, nobody ever said rational numbers were always going to look nice. It still equals 4.7010010001.

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13y ago

What else can I help you with?