20 30 40 56
LCD(9, 28) = 252
50
20 + 6 - 56 = -30
It is: 4
The LCD is 56. The two have no common factors, so the LCD is their product, 7 x 8 =56
Greatest common denominators are infinite. The GCF is 8. The LCD is 840.
LCD(28, 56) = 56.
20 to 40 ITS 20-56
The factors of 40 are: 1 2 4 5 8 10 20 40 & The factors of 56 are: 1 2 4 7 8 14 28 56
28+28=56
20 5 30 6 42 7 56 8............... 4*5=20 5*6=30 6*7=42 7*8=56
5 factors into 1 and 5 6 factors into 2 and 3 Therefore, the least common multiple is 1*2*3*5 = 30 This is what you would use for the LCD, convert the fifths and sixths into thirtieths.