The ratio of salary of a worker in July to that in June was 21⁄2 : 21⁄4, by what % the salary of July more than salary of June. Also find by what %, salary of June was less than that of July.  Choose the correct choice from the following options:
A) 11 1⁄9% and 10% B) 10% and 11 1⁄9% C) Both 10% D) Both 11 1⁄9% E) None of these
Let the salary of July be 5⁄2 x   and the salary of June be 9⁄4 x   Required percentages   = 5/2x−9/4x /9/4x×100 and 5/2x−9/4x /5/2x×100   = 100⁄9% and 100⁄10% = 11 1⁄9% and 10%   11 1⁄9% and 10%nswer 11 1⁄9% and 10%
<result>A</result>
The ratio of salary of a worker in July to that in June was 21⁄2 : 21⁄4, by what % the salary of July more than salary of June. Also find by what %, salary of June was less than that of July.