The population of a country has been decreasing for several decades. In 1990 the population was about 127 million people in 2010 the population was about 118 million people determined the percent decrease in the country population during this time period

7.1%

Step-by-step explanation:

OK, there are now 118 million people and there were 127 million people. If we divide 118 million by 127 million, we get about 92.9%. That's a decrease of 7.1% from 100%, so the population decline over the 20 year period is 7.1%