Thanks @jade-macfie, but this does not answer my question. I will clarify.

My question is when paying the employees their hourly or weekly amounts, is this 80% of their standard hourly/weekly rate, eg $20 per hour ($20 * 40hrs = $800 * 80% = $640) or is it the same as we pay public holidays and bereavement leave, which reflects a 52 week average eg $20 per hour with an average work week in the last 52 weeks being 45 hours ($20 * 45 = $900 * 80% = $720). Should the 80% be based on average weekly earnings i.e. ($640 or $720)?