Chris earns $7910 per month. His monthly expenses include: $970 in rent, $910 in recreational expenses, $450 in food, $370 in auto payments, $200 in gas and maintenance, $700 in student loan repayments, $260 in credit card payments, and $1810 in miscellaneous expenses. Assuming Chris saves his monthly surplus, what is his approximate savings rate? (Round answers to 2 decimal places, e.g. 52.75.)