So,
To find the G.C.F. of $0.75, $0.25, $1.50, and $300,
Think of them as 75, 25, 150, and 300.
Find the prime factored form (P.F.F.) of each number.
P.F.F. of 75: 3*5*5
P.F.F. of 25: 5*5
P.F.F. of 150: 2*3*5*5
P.F.F. of 300: 2*2*3*5*5
Find common groups.
5*5 is in all of them.
5(5) = 25
25 is the G.C.F. of 75, 25, 150, and 300 ($.75, $.25, $1.50, and $3.00).
