2 / 3 to 19 / 3 to 8 / 5 to 20.25 to 0.75

2 / 3 to 19 / 3 to 8 / 5 to 20.25 to 0.75

2/3;1/3=2/3÷1/3=2/3×3=2
9:8=9÷8=9/8
3/5:2/5=3/5×5/2=3/2
0.25:0.75=25÷75=1/3