If b equals 10% of a and c equals 20% of b, then which one of the following equals 30% of c?	Select.
A) 0% B) 0.6% C) 0.06% D) 6.0% E) None of these
Explanation :   Given,   b=10% of a   =&gt;(10/100)= 
<gadget id="calculator">(10/100)</gadget>
<output>1/10 = around 0.1</output>
&gt;0.1a.   And, c=20% of b   =&gt;(20/100)= 
<gadget id="calculator">(20/100)</gadget>
<output>1/5 = around 0.2</output>
&gt;0.2b=&gt;0.2×0.1a   Now, 30% of c=(30/100)×c.   =&gt;0.3c=(0.3)(0.2)(0.1a)   =&gt;0.006a=0.6%   Answer : 0.6%
<result>B</result>
If b equals 10% of a and c equals 20% of b, then which one of the following equals 30% of c?