8 % of a number is 216. ,What is the number?

50 % of 50 % of16 is:

If A : B = 3 : 2 ; B : C = 4 : 5, what is A : B : C ?

Convert 16 2/3 % into a fraction:

2/8 ÷5/8 = .........

What is the rational form of 0.031?