Celery: 4 ÷ 200× 100% = 2%

Radish: 6 ÷ 200× 100% = 3%

Chinese cabbage: 100 ÷ 200× 100% = 50%

PS: The celery planting area should be 40 hectares, and the radish planting area should be 60 hectares. If so, celery is listed as:

40 ÷ 200× 100% = 20% and radish: 60 ÷ 200× 100% = 30%. Or the planting area of Chinese cabbage 10 hectare?

Then Chinese cabbage should be listed as:10 ÷ 200x100% = 50%.