Matt did his homework for 150 minutes. He spent 30% of that time on math and 40% on science. He spent the remaining time on other subjects. How much time did Matt spend on homework in other subjects?
Please answer and provide answer explanation.
45
Matt spent on math and science 30% + 40% = 70% of the time.

This means he did homework from these two subjects for 70 / 100 * 150 minutes = 105 minutes.

So Matt spent 150 minutes - 105 minutes = 45 minutes doing homework from other subjects.

.

The final answer: 45