Give the step-by-step reasoning process and then the final answer. Ali has $480. He spent half of it on food, and then he spent a third of what was left on a pair of glasses. How much money did he have left?
Ali spent 480 / 2 = $240 on food. After buying the food, Ali had 480 - 240 = $240 left. He spent 240 / 3 = 80 dollars on a pair of glasses. He had 240 - 80 = $160 left.
The final answer: 160.