tolong ya dibantu terima kasih

1)2 1/2:0,5×75persen=5/2:5/10×75/100=5/2×10/5×75/100=3750/1000=3 750/1000=3 3/4
2)7/25×4/4=28/100=28persen
3)0,3-2/5+25persen=3/10-2/5+25/100=15/100=3/20
4)2,5cm:125km=2,5:12500000=1:5000000
5)60:3/4=60×4/3=80
6)sekantong=8/8-3/8=5/8baagian
7)5+2/2=7/2×18=63th