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Math problem: add conditions according to the formula.
1. Yucai Primary School is 80% of Xingguang Primary School.

2. The number of students in Xingguang Primary School is 125% of Yucai Primary School.

3. The number of people in Yucai Primary School is 25% more than that in Xingguang Primary School.

The number of students in Yucai Primary School is 20% less than that in Xingguang Primary School.

You can ask questions if you don't understand. If it helps, please adopt it. Thank you!

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