Find the GCF of each number.

75 ¢, 25¢, $1.50, $3.00

The gcf of 75 cents, 25 cents,$1.50 and $3.00 is 25 cents

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).