5.12 = 5 11/90
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No even number (except "2") can be a prime number. -S.M.
512 = 29
29 = 512
Oh, dude, let me break it down for you. A rational number is any number that can be expressed as a fraction where the numerator and denominator are integers. So, if you can write 5.12 as a fraction, then it's rational. Spoiler alert: you can totally write 5.12 as 512/100, which means it's a rational number. Like, no big deal.
910/512 = 455/256