400/240 = 5/3
What percentage of the afforestation area this year accounts for last year?
240 ÷ 400 = 3/5
2. A county afforested 240 hectares last year and 400 hectares this year. How much more afforestation area is this year than last year?
(400-240) ÷ 240 = two thirds
How much less afforestation area was last year than this year?
(400-240)÷400 = 5 choose 2
A county afforested 240 hectares last year, and this year's afforestation area is three-fifths of last year's. How many hectares have been afforested this year?
240× 3/5 = 144 (hectare)
How many hectares more than last year?
240- 144 = 96 (hectare)
A county planted 240 hectares of trees last year, and the afforestation area this year is two-thirds more than last year. How many hectares have been planted this year?
240× (1+2/3) = 400 (hectare)
How many hectares more than last year?
400-240 = 160 (hectare)
A county afforested 400 hectares this year, and the area last year was three-fifths of this year. How many hectares were afforested last year?
400× 3/5 = 240 (hectare)
How many hectares were planted less last year than this year?
400-240 = 160 (hectare)
6. A county afforested 400 hectares this year, and the afforestation area last year was two-fifths less than this year. How many hectares were afforested last year?
400× (1-2/5) = 240 (hectare)
How many hectares of green area was reduced last year compared with this year?
400-240 = 160 (hectare)