To simplify a three-term ratio, divide all terms by their highest common factor.<br><br>
&bull; The HCF of 56, 16, and 32 is 8.<br>
&bull; 56 ÷ 8 = 7<br>
&bull; 16 ÷ 8 = 2<br>
&bull; 32 ÷ 8 = 4<br>
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Final Answer: 7 : 2 : 4