To improve the sentence "If so, to much of your income is devoted to housing costs," the correct change would be:
- Change "to much" to "too much"
By making this change, the sentence would read: "If so, too much of your income is devoted to housing costs." This correction uses the correct spelling of "too much," which means an excessive or unreasonable amount. This change ensures the sentence is grammatically accurate and effectively conveys the idea that a significant portion of the income is spent on housing costs.
