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I'm having trouble understanding the conversion of Octal Numbers to Decimals Numbers. It mostly comes down to the decimals I have most trouble with and was hoping someone could explain more in depth.

I have this number: 4.5 in octal that translates to 4.625 in decimal. Now from my understanding in Octal it goes 1-8-64-512 so: 4*1 = 4, 0.5 * 1/8 = .0625 so the answer I'm getting is 4.0625 - is there something in decimals that I'm missing?

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    $5\times (1/8)$, not $0.5\times(1/8)$.2012-09-06

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