The denominators of 20 and 15 are both 1, therefore, the lowest common denominator is 1.
60
300
LCD(8, 20, 15) = 120
A common denominator of 20 and 30 is 600. This is NOT the least common denominator, though.
The denominators of 20 and 15 are both 1, therefore, the lowest common denominator is 1.
The least common denominator (LCD) is 1.
60
20, although if you reduced 15/20 to 3/4, the common denominator would be 4.
60
300
LCD(8, 20, 15) = 120
60
180
The lowest common denominator of any set of whole numbers is 1
1/5 + 3/4 First you have to find the common Denominator. The common denominator is 20. 1/5 = 4/20 (5x4=20, so you have to multiply the 1 by 4 as well) 3/4=15/20 (4x5=20 and 3x5=15) Now that you know your common denominator is 20, you can now add your fractions. 4/20 + 15/20 = 19/20 (you only add the numerator, the denominator stays the same) so, your answer is...... 19/20
A common denominator of 20 and 30 is 600. This is NOT the least common denominator, though.