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Master Li finished machining parts in three days, 2 / 9 in the first day, 180 in the second day, exactly 2 / 3 of the total number
Total = 180 (2 / 3-2 / 9) = 405
Processing = 405 × 2 / 3 = 270 pieces
Master Li processes a batch of parts. On the first day, he processes 25% of these parts. On the second day, he processes 15 more. The ratio of the parts processed in the two days to the total number of these parts is 1:3?
Solution: if the total number of this batch of parts is x, 25% x will be processed on the first day
(25%X+15)/X=1/3
X=180
Do you know how to do it?
Master Li processes a batch of parts. On the first day, he processes one-third of all the parts. On the second day, he processes 15 parts. The parts boxes that have been processed in two days are left to be processed
How many parts are there in this batch?
There are 90 parts in this batch. The solution is as follows: the ratio of the number of processed parts and the remaining parts is 1:1, which means that the processed parts account for 1 / 2 of the total number, and the remaining parts also account for 1 / 2 of the total number
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