(2) When no such exact determination of pay received for services performed in Connecticut is possible, the income of employees who are compensated on an hourly, daily, weekly or monthly basis shall be apportioned to Connecticut by multiplying the total compensation, wherever earned, from the employment, by a fraction the numerator of which is the number of days spent working in Connecticut and the denominator of which is the total working days both within and without Connecticut. The product is included in Connecticut adjusted gross income derived from or connected with sources within this state. The term "total working days" does not include days on which the employee was not required to work, such as holidays, sick days, vacations and paid or unpaid leave. For purposes of this section, when a working day is spent working partly in Connecticut and partly elsewhere, it is considered one-half of a day spent working in Connecticut. Example:An auditor living in Massachusetts is employed by an accounting firm in Hartford at an annual salary of $33,000. She is not able to establish the exact amount of pay received for services performed in Connecticut. She works a total of 240 days in 1992, performing field audits in Rhode Island on 160 days of the year and working 80 days in Hartford. Her Connecticut adjusted gross income derived from or connected with sources within this state is $11,000, computed as follows: