Ari will think that there is not enough ice cream for the amount of caramel.
3:5 and 6:8 are not equivalent
But let's prove that;
We know that 3 x 2 is 6, so let's multiply 3 x 2 and 5 x 2, when we do so, we get 6:10.
6:10 is greater than 6:8, so there is obviously less ice cream for the amount of caramel.