Ratios! Definition: A ratio is a comparison of the relative size of two or more quantities. If the ratio of quantity A to quantity B is 2 to 5, or 2 5, then for every 2 units of quantity A there are 5 units of quantity B What are the two quantities being compared in the following ratios? Ratio GPA is 2.74 Thing 1 Thing 2 Only 1 U.S. Adult in 5 could calculate interest 13% of U.S. Adults are numerate APR 6% Speed is 7.24 mph Half of 17 year olds don't know enough math to work in auto plant Math SAT scores for Elem Ed. majors compared to Natl Avg, is 483 vs. 515 You borrow S300 and pay $350 at the end of the month 52% of freshman say their emotional health is above average