18/21 x 15 is 12 6/7
2/5 x 1/3 x 9/14 = 18/210 = 3/35
gcf(18, 21, 42) = 3. 18 = 2 x 3^2 21 = 3 x 7 24 = 2^3 x 3 hcf = 3
6 x 3 = 18 7 x 3 = 21 therefore 6 to 7 = 18 to 21
18 over 21 in lowest terms is 6/7
18/21 x 15 is 12 6/7
18 = 2 x 3 x 5 x 19 21 = 3 x 7
2/5 x 1/3 x 9/14 = 18/210 = 3/35
I got 441. -9 x 2 = -18. -18 - 3 = 21 21 x 21 = 441
18/21
-18+x = 3 x = 3+18 x = 21
21/x = 105/5 = 21 21 = 21x x = 1
gcf(18, 21, 42) = 3. 18 = 2 x 3^2 21 = 3 x 7 24 = 2^3 x 3 hcf = 3
6 x 3 = 18 7 x 3 = 21 therefore 6 to 7 = 18 to 21
x/5 = 8/21 x = 8/21 * 5 x = 1.904761905
18 over 21 in lowest terms is 6/7
21/18 = 7/6 ~ 1.1666...7