10% is the one year category inflation for food, 15% since 2020 is the overall CPI inflation. These are different numbers because the first only looks at the food that Americans buy while the second looks everything people spend their money on.
The intent of my response was to explain why saying "my grocery bill has gone up 50%" does not negate the fact that there has been 15% inflation since 2020. This is because food inflation and overall inflation are not the same, and because you are experiencing an above-average increase in your grocery bill.
Perhaps food inflation since 2020 would be the more relevant number. That is 21.9%: https://www.usinflationcalculator.com/inflation/food-inflati... (you can calculate this by multiplying the food inflation numbers for 2020, 2021, and 2022, 1.104x1.063x1.039)
> Inflation is 50% vs. 2006
> Only 15% vs. 2020
You:
> The overall inflation across the average basket of food that American consumers buy over one year was 10%.
[EDIT] Oh god, you're the same poster, how did this confusion happen?