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) 17.9% D) 18.12% E) 75%
Increase = (30/40)*100 = (3/4)*100= 
<gadget id="calculator">(3/4)*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?