Tolong ya kak,sebisa kakak aja

1. 2 1/2+ 1 1/4= 5/2+5/4= 10/4+5/4= 15/4= 3,75kg
2. 7- 3 1/4= 7- 13/4= 7- 3,25= 3,75
3. 1,34+1,257+1= 3,597
4 4-1,75-2,05= 0,2
5. 47-25=22%
6. 38.35%