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Master Li processes a batch of parts at a low price. He processes two fifths of the parts on the first day and 30% on the second day, leaving 60 unprocessed parts
This batch of parts is made up of three parts
60÷（1-2/5-30%）
=60÷30%
=200
Master Li wants to process a batch of parts. He processes three tenths of them on the first day and two fifths on the second day. How much is left unprocessed?
1-3/10-2/5=3/10
There are three tenths left unprocessed
Master Li wants to process a batch of parts. He has already processed 2 / 5 of the total number. If he processes 210 more parts, he will process 3 / 4 of the total number. How many parts are there in this batch?
210÷（3/4 - 2/5）
= 210 ÷ 7/20
=600
Master Li plans to complete a batch of parts in seven days, producing 50 pieces a day. In fact, he produces two fifths more parts a day. How many days does it take to complete the task?
Total task: 7x50 = 350
Daily actual production: 50x (1 + 2 / 5) = 70
Then 350 / 70 = 5 days
RELATED INFORMATIONS
- 1. When Master Li processes a batch of parts, two fifths of the work is finished. According to this calculation, how many hours does it take Master Li to complete all the tasks?
- 2. The master and the apprentice produce a batch of parts. The parts produced by the apprentice account for two fifths of the total number of parts. If the apprentice gives the master 15 parts, the ratio of the number of parts produced by the apprentice and the master is 1:3. How many parts are there in total?
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