Respuesta :

2 : 3 (reduced by a factor of 7 from 14 : 21) and 56 : 84 (increased by a factor of 4)
Let's turn that ratio into a fraction: 14/21

14/21... Let's pull some common factors out.

If I remember my times tables, 7 fits into both 14 and 21 so let's divide the top and bottom by 7:
2/3

And 2/3 is the same as 2:3

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