A ten year comparison between the United States and the Soviet Union in terms of crop yields per acre revealed that when only planted acreage is compared, Soviet yields were equal to 68 percent of United States yields. When total agricultural acreage (planted acreage plus fallow acreage) is compared, however, Soviet yield was 114 percent of US yield. From the information above, show that a higher percentage of total agricultural acreage was fallow in United States than in the Soviet Union.
I keep falsely calculating a result in my process of solving the problem such that the United States has more fallow land than the Soviet Union, but I know this is wrong conclusion by proof by contradiction.