VW was rather strict before strike - they had some existing offer and were presenting this as non-negotiable. Even during first days of strike they offered really small increase, so I was initially very surprised when news annonuced 14% increase. Here [1] is original article in Slovak and here [2] is google translation to english.

1: https://www.aktuality.sk/clanok/500481/strajk-vo-volkswagene...

2: https://translate.google.com/translate?sl=auto&tl=en&js=y&pr...

Yeah, 1.047 * 1.047 - 1 ≈ 9.6%. If the original agreement was for one year 4.7% and the next 4.1%, the increase would be 1.047 * 1.041 - 1 ≈ 9.0%. Maybe it was a rounding error.