Two numbers are respectively 20% and 50% more than a third number. What percentage is the first of the second?	Choose the correct choice from the following answers:
A) 25% B) 60% C) 80% D) 55% E) 74%
Required answer = (100+x)/(100+y)*100 = 120*100/150= 
<gadget id="calculator">120*100/150</gadget>
<output>80</output>
80%   Answer is 80%
<result>C</result>
Two numbers are respectively 20% and 50% more than a third number. What percentage is the first of the second?