125% of n is 30 what is 25% of n
125% = 1.25
"Of" means "Multiply"
So
1.25n =30 divide both sides by 1.25
n = 30/1.25 = 24
25% = .25 = 25/100 = 1/4
(1/4) of 24 = 24 (1/4) = 6