
I get 42% for those 2021 numbers, but then again I don't math much anymore.

47902 / 28775 = 1.66 -> 66%
sorry, that's NOT how % of change is calculated, but the result is correct anyway.
The formula is ((P2-P1)/P1)X100%=((47902-28775)/28775)X100%=66.4%
https://www.investopedia.com/terms/p/percentage-change.asp