well first we divide 16 by 4 because we have to split the cars up equally in 4 groups and the answer we get to that is 4 so there are 4 cars in each group. Now we do the same for the boats we take 24 and divide by 3 and get 8, so there are 8 boats in each group. Now we take the toy boats in one group because there are obviously more of them and subtract the cars that are in one group and get a difference of 4 which is the answer
