What percent of 7.5 billion is 2..2 billion?

To find what percent 2.2 billion is of 7.5 billion, divide 2.2 billion by 7.5 billion and then multiply by 100. This calculation gives you (2.2 / 7.5) × 100, which equals approximately 29.33%. Therefore, 2.2 billion is about 29.33% of 7.5 billion.