Study the given bar-graph and answer the question that follows.
The bar-graph shows the population of six countries (in millions) in 2010 and 2020.

In the USA, by what approximate percentage did the population increase by 2020 over its population in 2010?

23.08%

Population of USA in 2010 = 65

Population of USA in 2020 = 80

Percentage increase = \(\frac{80 - 65  }{65}\) × 100

= \(\frac{3 }{13}\) × 100

= 23.08%