According to data on the website for the Centers for Disease Control and Prevention (CDC), 35% of American adults were obese in
2011-2012* . In this report, adults were considered to be 20 years of age or older. According to the U.S. Census Bureau, about 72% of Americans are adults (20 and over). Use the U.S. Population estimate of 312 million people to calculate the number of American adults age 20 and older in 2011-2012. Enter answer as a number in standard form.
You isolate the variable by dividing each side by factors that don't contain the variable. This variable (K) is not a whole number so I gave you the fraction and rounded decimal form. Hope this helps :)
