Difference between critic and audience % on RT is deceptive

I was checking out the RT critic and audience scores for the Peacock show Poker Face, and the difference between the critic rating (99%) and audience rating (79%) was quite surprising. Then I looked at the actual average ratings. (FYI, for those who don't know:  the "tomato scores" reflect the % of votes that were "positive" and is not the actual average rating.) RT uses a 10-point  scale for critic averages and a 5-star scale for audience averages. The average critic rating was 8.5/10 and the average audience rating was 4/5. Or, to express those numbers as percentages, the average critic rating was 85% and the average audience rating was 80%. Only a 5-point difference rather than the 20-point difference the tomato scores would lead you to believe.