Mid Month Amortization Formula under IFRS

Hi,

Regime is IFRS

Calculation Frequency : Periodical Amortization

proration rule 365

Payment Term Start Date 12-09-2012

Payment Term End Date 11-09-2027

Amortization formula under IFRS is very simple ROU/number of periods. But when payment start date is not on first of month (suppose 12 of the month), then each month is the same except first and last months.

How is the amortization calculated in this case?

In the Lease Detail Report it shows that "Term Duration Months is 179.99", while payment term is exactly 180 months. Any idea why or how 179.99 is reached.

Thanks,

Nawaf