miabarrett2523 miabarrett2523 30-05-2024 Mathematics Answered For the year 1970, 71.70% of Americans were married. For the year 2010, 56.34% of Americans were married. Compute the percentage change. a. 21.4% (increase) b. 21.4% (decline) c. None of the above. d. 67% (decline)