0.75 0.8 5.69 56.9 7.217 7.226.04 6.004 0.9 0.839 3.50 3.6.
3÷5= = :15== %
0.4= :4=4÷ = %
18: == %=1.8= ÷40.
= : = ÷25= %
5÷2= = :12= %.