Answer:
Around 4 : 3 because the measurements might not be perfect.
Explanation:
So the ratio of the NEW : ORIGINAL is just one side of the rectangle to the other side of the original one.
We know that the newer rectangle (or the larger one) has 4 cm as its side and that the original one (the smaller one) has 3cm as its side. Then we can create the ratio of NEW : ORIGINAL as: 4 : 3