EDIT: I added an extra 0 when multiplying...should be 2900 and not 29,000!
I have a slightly different way, but it's basically saying the same thing.
435is15percentofwhatnumber435=15percentofN435=15%ofN435=15%×N435=0.15×NDivide both sides by 0.152900=N
415/.15 = 2766.666666666666667
test:
2766.66666666*.15= 415
what's wrong with that //
Anon