To simplify a three-term ratio, divide all terms by their highest common factor.<br><br>
&bull; The HCF of 16, 12, and 24 is 4.<br>
&bull; 16 ÷ 4 = 4<br>
&bull; 12 ÷ 4 = 3<br>
&bull; 24 ÷ 4 = 6<br>
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Final Answer: 4 : 3 : 6