The tax on a commodity is diminished by 20% but its consumption is increased by 10%. Find the decrease percent in the revenue derived from it?
A. 20%
B. 18%
C. 15%
D. 12%
Explanation:
100 * 100 = 10000
80 * 110 = 8800
10000——- 1200
100 ——- ? = 12%