If cost of sugar increases by 10%. How much percent consumption of sugar should be decreased in order to keep expenditure fixed?
Choose the most appropriate option
A) 22%  B) 50%  C) 20%  D) 9.1%  E) 30%
100   110   -----   110 ----- 10   100 ------ ? =&gt; 9.1%   Answer: 9.1%
<result>D</result>
If cost of sugar increases by 10%. How much percent consumption of sugar should be decreased in order to keep expenditure fixed?