1, 2, 7 and 14 are common factors
For 42 1,2,3,6,7,14, & 21
For 70 1,2,5,7,10,14, & 35
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The LCM is 210.
LCM of 42 70 and 98 is 1470.
The GCF is 2.
42 / .60 = 70
3/5 of 70 = 70*3/5 = 423/5 of 70 = 70*3/5 = 423/5 of 70 = 70*3/5 = 423/5 of 70 = 70*3/5 = 42