a) 3/2*8/3*24/5=576/30=288/15
b)8/3*2/3*3==48/9=16/3
c)3/2*3/2*11/3=99/12=33/4
d(40/21*3/10*5/7=600/1470=60/147=20/490=2/49
e)79/19-11/5*10/9=79/19-110/90= 7110/1710-2090/1710=5020/1710=502/171
