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化简比,并求比值.0.12:56       &n

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化简比,并求比值.
0.12:56                               
5
6
(1)0.12:56,
=(0.12×50):(56×50),
=6:2800,
=3:1400;
0.12:56,
=3:1400,
=3÷1400,
=
3
1400;
(2)
5
6:
10
9,
=(
5
6×18):(
10
9×18),
=15:20,
=3:4;

5
6:
10
9,
=3:4,
=3÷4,
=
3
4.