If X is `30%` of Z and Y is `60%` of Z, then X is what percentage of Y?

If X is 3% of Z and Y is 60% of Z, then X is what percentage of Y ?

x, y and z are three numbers such that x is 30% of and y is 40% of z. If x is p% of y, then what is the vaJue of p?

If 15% of Y is same as 21% of Z, then 12.5% of Y is equal to what per cent of Z?

If 30% of x is same as 40% of y then what is y : x ?