Question

in a year, almost a billion people on the planet didn't have access to clean water. if there were 5,700,000,000 people in the world, then what percent of them lived without clean water

Answer 1

17.5 %. Simplify 5700000000 to 5.7 billion. 1 billion/5.7 billion = .175. Multiply by 100 for percent= 17.5%