The error is that both sides of the equation have a variable. So if you were to combine your like terms, then you'd leave one side without a number and if your teacher is saying there is a left over number then it will be 0
1:16 or 5:80, if you're simplifying then all you do is divide denominator by numerator. then that's your simplified ratio
Their equal because they both go the same
The top right is the answer!
