tolong di jawab ya...

1. A. 4/5×100=80%
B. 7/4×100=175%
5. 5^2=25
3^2=9
12^2=144
=25×9+144
369
6. 1jam= 60 mnt
180 mnt:60 =3jam
8. 180- (-50)
=180+50
=230