Question 978597
A book was sold for $20, making a 25% profit on the selling price. What was the
cost price?
<pre>
The selling price is 125% of the cost price.

$20 is 125% of what?

{{{20 = 1.25x}}}

{{{20/1.25=x}}}

{{{16=x}}}

Answer: $16

Edwin</pre>