It is simply 6:8. You could, if you wanted to, simplify the ratio by dividing both the numbers by their greatest common factor.
2 to 1
1 : 6
6/14 = 3/7
21:6::7:2
Factor out the 6, 6*1 : 6*7 as 6 appears in both sides of this ratio as a factor it can be eliminated 1 : 7 ===
Divide numerator and denominator by 3.2 . Arrive at the ratio: 3/8 or 0.375 .
21 : 6factor out a 33(7 : 2)7 : 2==========simplified ratio
The ratio 300 : 250 can simplify to 6 : 5
6 to 5.6 = 60 to 56 = 30 to 28 = 15 to 14
-2 + 8 = 6
12 : 20 = 6 : 10 = 3 : 5