Michael scored 260 points during his junior year on the school basketball team. He scored 20% more points during his senior year. How many points did he score during both years? Let's think first. Chain of thought:
In his senior year, Michael scored 260 1.20 = 312 points. In both his senior and junior years Michael scored 260 + 312 = 572 points.
Therefore, the answer is 572.