If 20% of a = b, then b% of 20 is the same as Choices.
A) 2% of a B) 3% of a C) 4% of a D) 5% of a E) 7% of a
20% of a = b   =&gt; b = 20/100a   b% of 20 = (b/100)20 = [(20/100a)/100]20   = (20 × 20 × a)/(100 × 100)   = 4a/100 = 4% of a   4% of a)
<result>C</result>
If 20% of a = b, then b% of 20 is the same as