mini-jumbo:
IME people find it easy to judge ratios/proportions but impossible to do "proper" sums. In fact I can't remember more than a handful of (admittedly, private) pilots over the years who've managed to give me more than a random number when I've asked them for the crosswind component.
(FWIW the same method can be used for drift and gs calcs if you know MaxDrift)
HFD