John makes $40 a week from his job. He earns a raise and now makes $80 a week. What is the % increase?
Choose the correct choice from the following choices
A) 16%  B) 16.66%  C) 17.9%  D) 18.12%  E) 100%
Increase = (40/40)*100 = (1)*100= 
<gadget id="calculator">(1)*100</gadget>
<output>100</output>
100%.   100%
<result>E</result>
John makes $40 a week from his job. He earns a raise and now makes $80 a week. What is the % increase?