John makes $40 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 options.
A) 16%  B) 16.66%  C) 18%  D) 21%  E) 75%
Increase = (30/40)*100= 
<gadget id="calculator">(30/40)*100</gadget>
<output>75</output>
75%.   75%
<result>E</result>
John makes $40 a week from his job. He earns a raise and now makes $70 a week. What is the % increase?