The lowest common denominator of 9, 25, and 49 is 11025.
The LCD is 9.
LCD (Least Common Divisor) is not a normal term. LCM (Least Common Multiple) is, as well as GCD (Greatest Common Divisor). The LCM of 10 and 25 is 50, while the GCD of 10 and 50 is 10. I suppose if you were really looking for the LCD of 10 and 25, it is 5.
For 49,57: 2793 For 4/9, 5/7: 63
49/25= 4.36
4, 9, 25, 49 4 has 1, 2, 4 9 has 1, 3, 9 25 has 1, 5, 25 49 has 1, 7, 49
79 49 + 25 = 74 74 - 4 = 70 70 + 9 = 79
25+15=40+9=49
49 x 2 = 98 14 x 7 = 98 98 is the LCD
4900
294
196
The factors of 3 are 1 and 3.