Beth is looking at her book collection and is wondering how many comic books she owns. She has 120 books and 65% are novels. 18 are graphic novels. The rest are comic books. What percentage of comic books does she own?
The proportion of graphic novels is .15 because 18 / 120 = 
<gadget id="calculator">18/120</gadget>
<output>3/20 = around 0.15</output>
.15.
The percentage of graphic novels is 15 because 100 x .15 = 
<gadget id="calculator">100*.15</gadget>
<output>15</output>
15.
The percentage of comic books is 20 because 100 - 65 - 15 = 
<gadget id="calculator">100-65-15</gadget>
<output>20</output>
20.

<result>20</result>