Question 454835
.9  9/10 also equals .90  90/100
.90/.45=2
the easiest way to do this is multiply both top and bottom by 100
90/45=2

90/100/45/100=90/100*100/45=90/45=2

your 9/10/9/20=9/10*20/9=20/10=2
but where did you get 9/20 and why?