18/21 = 6/7
The LCM of 21 and 18 is 126.
The highest common factor of 21 and 18 is 3
The Least Common Multiple of 18 and 21 is 126.
There are an infinite amount of answers to that, like: 21 - 3 = 18 1004 - 986 = 18 47 - 29 = 18
-21
-18
18, yes.21, no.
18/21
18/21 = 6/7
18
18 is what percent of 21= 18 / 21= 0.857143Converting decimal to a percentage:0.857143 * 100 = 85.71%
19
LCD(18, 21) = 126
-39
21
21/18 = 7/6 ~ 1.1666...7