The U.S. Senate has 100 senators. In 2015, only 20 senators were female. What is the ratio of female senators to male senators? (Note: You may not use a calculator.)

The Mathematical Reasoning section of the GED tests your ability to solve algebraic and quantitative problems. The GED Math Test contains 46 questions. Some question types include multiple-choice, drag-and-drop, hot spot, and fill-in-the-blank. The GED Math Test is 115 minutes (1 hour and 55 minutes).