<h2>
Rule of three</h2>
<em>The </em><u><em>rule of three</em></u><em> is a way to solve problems of proportionality between three known values and one unknown. It establishes a </em><u><em>relationship of linearity, proportionality</em></u><em>, between the values involved.</em>
<h3>We solve by applying the rule of three:</h3>
<em>Chicken Wings Price </em>
<em> 16------------------------$28.80</em>
<em> 9-----------------------------x</em>
<em>First, multiply the number of wings purchased by the given price, divided by the number of wings purchased.</em>
We solve
<h3>x = 9 × $28.80 / 16 = 16.2</h3>
Answer: 9 wings would cost a total of $16.2