respond cepat ya kak :)

4 2/8 :0,250 : 90%
=34/8 : 250 /1000 : 90/100
 =34/8 x 1000/250 x 100/90
=34000/2000 x 100/90
=34/2 x100/90
=3400/180
=340/18
=18 16/18
=18 8/9
=18,88
semoga bantu yaaa

4 2/8=34/8×125/125=4.250/1.000
0,250=250/1000
90 persen = 90/100

jadi
4.250/1000:250/1000:90/100=
4.250/1000:250/1000=17/1000
17/1000:90/100=1.530/100.000

kalo nggak salah