The short answer is P = 1.548, but since the class is trying to teach how to reduce a formula. You can rewrite the formula to cancel one side of the equation. like this, 5.4 * p/5.4 = 5.4*0.27, you multiply both sides by the 5.4 and they cancel out on one side so you get,
p = 5.4*0.27 = 1.548
Hope I did that right, it has been many years...
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