tolong di jawab semuanya y

a.9/4=2 1/4=2,25=225 %
b.56/100=-=0,56=56%
c.22/5=4 2/5=4,4=440%

a.8/15+2/15=10/15=2/3
b.3 2/4 +2 1/5=3 10/20+2 4/20=5 14/20
c.10/12-3/12=7/12
d.8/6-2/5=40/30-12/30=28/30