Step 1 :Let's denote the number of twin births in 2007 as \(x\). The decrease of 12% from 2007 to 2020 can be represented as \(0.12x\). According to the problem, this decrease is equal to 104,720. So we have the equation \(0.12x = 104,720\).
Step 2 :Solving this equation for \(x\) will give us the number of twin births in 2007.
Step 3 :The solution to the equation is approximately 872,667. This means that there were approximately 872,667 twin births in 2007.
Step 4 :Final Answer: There were approximately \(\boxed{872,667}\) twin births in 2007.