One job, originally planned to be completed in 10 days, was actually completed in 8 days, and the working time was shortened______ %, work efficiency improved______ %.A.12.5   B.20   C.25   D.10.

One job, originally planned to be completed in 10 days, was actually completed in 8 days, and the working time was shortened______ %, work efficiency improved______ %.A.12.5   B.20   C.25   D.10.

(10-8) △ 10 = 20%; (18-110) △ 110 = 25%; so the answer is: B, C