A man invested $150,000 in a new business enterprise. The first year he lost 33 1/3% of his original investment. The next year he made a profit of ¼ of his net worth at the beginning of that year. His net worth at the end of the second year was what part of his original investment?

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.