It goes into 78 3 times: 68.
68/78 = 34/39
(78 + 42 + 68 + 52) / 4 = 60
146
The GCF is 2.
1, 2, 4, 17, 34, 68 1, 2, 3, 6, 13, 26, 39, 78
73.5
6 times 13 equals 78 3 times 26 equals 78 2 times 39 equals 78 and 1 times 78 equals 78
34/39
78 * 78 = 6,084
68 multiplied by 68 is 4,624.
-17 times 4 is -68.