bantu saya Nomer 1,2,3

1.a.6/20 dikali 5/5=30/100
=0,30
=30%
b.90/125 dikali 8/8=720/1000
=0,720
=720%
c.4/5 dikali 20/20=80/100
=0,80
=80%
d.3/4 dikali 25/25=75/100
=0,75
=75%