How has the economics of farming and trade (or the sale of crops) changed?

What is agriculture's share of the overall U.S. economy? Agriculture, food, and related industries contributed $1.109 trillion to the U.S. gross domestic product (GDP) in 2019, a 5.2-percent share. The output of America's farms contributed $136.1 billion of this sum—about 0.6 percent of GDP

Explanation:

are you referring to matrix mathematics!

5.4%

explanation:

the acceptance rate for harvard is 5.4%. this means only 5 percent of people who apply actually get accepted!