Hi Suzuki
Policy starts 1 July, with increasing risk until the year-end, so 'average risk' is as at 1 October. So 25% of the risk gone by the end of year.
Alternatively: 1 unit of risk in July, 2 units in August, 3 in Sept, etc. Count up the risk units before year-end, and divide by the total. Won't give you exactly 25% due to a slight 'continuity correction', but it's near enough.
Ian
Last edited: Dec 16, 2018