Answer: in 2020 the population will be 7.7 billion people.
Explanation:
To begin with, we will find 1.2% percent by the number of people:
7,260,000,000/100%*1.2%=87,120,000.
We need to find an increase in 2020, therefore in 5 years. Then:
87,120,000*5=435,600,000;
7,260,000,000+435,600,000=7,695,600,000=7.7.
Consequently, in 2020 the population will be 7.7 billion people.