Apopulation decrease from 404 million to 288 million .which of the following is the percent decrease of the population

288/404 = 0.71

Hence 0.71 x 100 = 71%
Example:
12 is 20% of 60. In order to get 12 percent of 60, all you need to do is to divide 12 with 60. To get the percent means to get the parts of 100. To get it in the form of percent, just multiply the quotient by 100. 12/60=.2 x 100 = 20% .