Number of birds that did not lay eggs = Total number of birds - Number of eggs laid Given information: Total number of birds = 2,000 Number of eggs laid = 1,680 per day Number of birds that did not lay eggs = 2,000 - 1,680 = 320 Now, we can calculate the percentage of birds that did not lay eggs: Percentage of birds that did not lay eggs = (Number of birds that did not lay eggs / Total number of birds) x 100 Percentage of birds that did not lay eggs = (320 / 2,000) x 100 = 0.16 x 100 = 16% Therefore, the percentage of birds that did not lay eggs on that particular day is 16%.