Brazil population: 1.907×

Mexico population 1.123×

To find how much more the population was in Brazil than in mexico, you would subtract the Brazil population to Mexico's population:
The
's would not cancel out because they are representing further decimal places that aren't written, so you would subtract 1.907 and 1.123.
1.907 - 1.123= 0.784

Brazil's population is 0.784×
larger than Mexico.