Mid-term completion is 500/( 1200-500)=5/7.
2、
The greatest common factor of 48 and 84 is 12.
You can be assigned to 12 classes at most, with 4 schoolbags and 7 books in each class.
3、
5/ 12= 15/36
7/ 18= 14/36
13/36
Fruit trees have the largest area and willow trees have the smallest area.