If `x%` of 25 is equal to `y%` of 15 and `y%` of 15 is equal to `25%` of 20, then find the value of x.

x% of y is equal to y% of x.

If x% ofy is equal to 1% ofz y% of z is equal to 1% ofx and z% of x is equal to 1% of y, then the value of xy+yz+zx is

Find the value of : 25% of 200