Finally, subtract your answer by one of the factors...
1,243-1,105
Which will result as 138. Which is also one of the factors you added earlier, that's basically what your looking fro when checking and subtraction and/or addition problem.
You would multiply 16*3 to get an estimate. 16*3= 48 The bike would be about 48 units. I'm assuming you mean a 16:1 scale. 16:1= 16/1 which =16 Hope this helps!
