The 2020-21 annual report's performance table says the Commission answered 71.3% of enquiries within one working day and 28.7% within two working days. The second target is cumulative: everything answered within one day was also answered within two. The two-day figure cannot be lower than the one-day figure.
The 28.7% is exactly 100% less 71.3%, so it may be the share not answered within one day, printed as the share answered within two. The same report's statistical appendix gives different figures again: 79.09% of enquiries closed on the same day and 20.91% closed on a later day. The Commission has not published a correction that Regulator Review has found.
Sources: LSC Annual Report 2020-21, PDF p 30; Annual Report 2020-21, Appendix B (Annual Report Statistics 2020/2021), p 14.