Hi there,
I hope you and your family are staying safe and healthy!
In order to know if they are equivalent to 7:3, we need to divide them so that we can get their decimal number to make it easier to compare them.
so 7 divided by 3 = 2.3
In order for them to be equivalent to 7:3, they must equal the same thing
So let's divide the rest:
So 14 divided by 6 = 2.3 (equivalent)
21 divided by 4 = 5.25 (this is NOT equivalent)
35 divided by 15 = 2.3 (equivalent)
Thus, we can say:
14:6 and 35:15 are equivalent to 7:3 because when we divide them all, they all equal to 2.3
However, 35:15 is NOT equivalent to 7:3 because when we divide it, it didn't give us 2.3
Happy to help!
~Garebear