A project is planned to be completed in 10 days, and the actual task is completed in 8 days. The working time is shortened by 20%, and the work efficiency is improved by 25%! Why? Working time reduced: (10-8) △ 10 = 20% Work efficiency: originally completed in 10 days, 1 / 10 of every day, The actual completion time is 8 days, 1 / 8 of every day Improved: (1 / 8-1 / 10) △ 1 / 10 = 1 / 4 That is to say, the work efficiency is 25% higher than the plan! (1 / 8-1 / 10) why divide by 1 / 10?

A project is planned to be completed in 10 days, and the actual task is completed in 8 days. The working time is shortened by 20%, and the work efficiency is improved by 25%! Why? Working time reduced: (10-8) △ 10 = 20% Work efficiency: originally completed in 10 days, 1 / 10 of every day, The actual completion time is 8 days, 1 / 8 of every day Improved: (1 / 8-1 / 10) △ 1 / 10 = 1 / 4 That is to say, the work efficiency is 25% higher than the plan! (1 / 8-1 / 10) why divide by 1 / 10?

Because one in eight minus one in 10 is increased in one day. If you want to calculate the increase in 10 days, you have to multiply by 10. If you divide by one in 10, you will multiply by 10?