21 can be divided by 7 but 18 cant
-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
-39
LCD(18, 21) = 126
3 is the GCF of 12, 18, and 21. 3x4=12 3x6=18 3x7=21 3 is the GCF of 12, 18, and 21.
21