Final answer:
Chuck's monthly grocery expenses of $150 constitute 15% of his $1,000 income. Thus the correct option is c.
Step-by-step explanation:
Chuck's monthly income is $1,000. To find the percentage spent on groceries, we calculate the grocery expenses by subtracting Chuck's fixed expenses from his income. The total fixed expenses (Rent + Car Insurance + Utilities) amount to $550 ($300 + $100 + $150).
Subtracting this from Chuck's income gives us $450 ($1,000 - $550) for discretionary spending. Chuck's grocery expenses are $150, which represents 15% of his income ($150 / $1,000 * 100). Therefore, Chuck spends 15% of his income on groceries.
In conclusion, Chuck allocates 15% of his $1,000 monthly income to cover grocery expenses, leaving him with $450 for other discretionary spending after meeting his fixed expenses.