Can someone explain Gottlob Frege's basic law V to me?

it is “for concepts F and G, the extension of F equals the extension of G if and only if for all objects a, Fa if and only if Ga”.
Its for a paper on the philosophy of mathematics I'm writing.

3 answers

how do ou turn a friction into %
You take the numerator and divide it by the denominator....

numerator= on top

demoninator = on bottom
Who will participate in extension and why