Answer:
390 Mins
Explanation:
If we take a look here, we currently have 600 total mins, and we are trying to find the total time that he spends on OTHER homework besides math
we know that he spends 35% of his time on math, so let's take the difference to find the percentage of time spent on other assignments
100%-35% = .65
Now that we know the percentage of time he spends on other work, we find the amount of time he spends on those other assignments by multiplying the total by the percentage
600*.65 = 390 mins