Question

Between 2000 and ​2015, the number of twin births in a certain country increased by ​14%, to approximately 133,950 . About how many twin births were there in​ 2000? There were approximately ____ twin births in 2000.

Answer 1

Let the number of twin births in 2000 be x.

According to the problem, the number of twin births in 2015 increased by 14%, which means the number of twin births in 2015 is:

x + 0.14x = 1.14x

We also know that the number of twin births in 2015 is approximately 133,950, so we can set up the following equation:

1.14x = 133,950

Solving for x, we get:

x = 117,500

Therefore, there were approximately 117,500 twin births in 2000.