Entry fee in an exhibition was Rs. 1. Later, this was reduced by 25% which increased the sale by 20%. The percentage increase in the number of visitors is :  Choose the correct option.
A) 33 B) 37 C) 60 D) 28 E) 27
Explanation:   Let the total original sale be Rs. 100. Then, original number of visitors = 100.   New number of visitors = 120/0.75= 
<gadget id="calculator">120/0.75</gadget>
<output>160</output>
160.   Increase %= 60 %.   Answer: 60) 60 %
<result>C</result>
Entry fee in an exhibition was Rs. 1. Later, this was reduced by 25% which increased the sale by 20%. The percentage increase in the number of visitors is :