SSC CPO SI and ASI 2015 Paper

(1) Percentage increase in type $\mathrm{}\mathit{B}=$
$\mathrm{}\frac{10-6}{6}\times 100=66.67\%$
Percentage increase in type $\mathrm{}\mathit{A}=$
$\frac{22-20}{20}\times 100=10\%$
Percentage increase in type $\mathit{C}=$
$\frac{11-10}{10}\times 100=10\%$
Percentage increase in type D =
$\frac{9-15}{15}\times 100=-40\%$
Hence, in type B of employees, the change was maximum.