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penfila11Pen
4m to 8m is simply:
       4 : 8
 which is 1 : 2
apologiabiology
4m to 8m
4m:8m
treat as fraction to simplify
4m/8m=(2 times 2 times m times 1)/(2 times 2 times 2 times m)=(2/2) times (2/2) times (m/m) times (1/2)=1 times 1 tiems 1 times 1/2

ratio is 1:2

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