Some-time after the new workers were introduced, all of the newly introduced workers left the work due to heavy rain and the efficiency of the remaining workers reduced by `20%` due to which the work finally got completed by delay of `60%` of the scheduled time then how much work still remained incomplete by the end of the scheduled time?

Options

A. `17(3)/(5)%`
B. `21%`
C. `27(5)/(7)%`
D. `28%`

Answer

C