John spent ¼ of his life as a boy growing up, 1/6 of his life in college, and ½ of his life as a teacher before he retired. What fractional part of his life did he spend before he retired?

A (U.S.) business math course typically includes a review of elementary arithmetic, including fractions, decimals, and percentages. Elementary algebra is often included as well, in the context of solving practical business problems.