2. We originally planned to afforest 12 hectares, but actually afforested 14 hectares. What percentage is the original planned afforestation less than the actual afforestation?
3. There was a pile of yellow sand at the construction site, weighing 120 tons, which was transported 25% on the first day and 20% on the second day.
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4. The number of geese is 1.5 times that of ducks. How many percent are there fewer ducks than geese?
5. After a commodity is increased by 20% and then reduced by 20%, is the current price equal to the original price? Why?
6. If Northland Hualian Supermarket conducts promotional activities, all goods will be 15% off. In fact, the merchants first raise the original price by 20%, and then sell it at a 15% discount. Will you use the current promotion period to buy goods? Talk about your opinion.
7. A monkey is eating peaches in a tree. On the first day, he ate all 20%, the next day he ate the remaining 25%, and finally there were 60 peaches left on the tree. How many peaches are there on the tree?
8. A batch of parts can be completed in 20 days with the cooperation of master and apprentice. The work efficiency ratio of master and apprentice is 3: 2. What percentage of these parts are completed by the master and the apprentice every day?
9. A rope is 60 meters long. Cut off 25 meters for the first time and the remaining 40% for the second time. How many meters does it take to cut the rope twice?
10. Take out 20% of a barrel of oil for the first time, 36kg for the second time, and take out half of this barrel of oil twice. How much does this barrel of oil weigh?