If the price has fallen by 10% what percent of its consumption be: increased so that the expenditure may be the same as before?  Choose the correct option:
A) 11 1/8%
B) 11 1/5%
C) 11 1/9%
D) 11 7/9%
E) 21 1/9%
100 – 10 = 90   90------10   100------? =&gt; 11 1/9%   Answer: 11 1/9%
<result>C</result>
If the price has fallen by 10% what percent of its consumption be: increased so that the expenditure may be the same as before?