John makes $50 a week from his job. He earns a raise and now makes $70 a week. What is the % increase?  Choose the correct choice from the following choices:
A) 16%  B) 16.66%  C) 17.9%  D) 20%  E) 40%
Increase = (20/50)*100 = (2/5)*100= 
<gadget id="calculator">(2/5)*100</gadget>
<output>40</output>
40%.   40%
<result>E</result>
John makes $50 a week from his job. He earns a raise and now makes $70 a week. What is the % increase?