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A road is 5 / 4 meters long. The road repair team repaired 1 / 3 meter on the first day and 1 / 4 of the road on the second day. How many parts of the road remain to be repaired? There must be a formula within two days
The first day: 1 / 3 △ 4 / 5 = 5 / 12
Remaining: 1-5 / 12-1 / 4 = 1 / 3
The road repair team builds a highway. It repairs two fifths of it every day. After three days, what percentage of it has not been repaired?
The road repair team repaired 3 * 2 / 15 = 2 / 5 in three days;
The remaining 1-2 / 5 = 3 / 5
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