-39.15% is the change from 212 to 129
Calculation steps:
[( 129 - 212 ) ÷ 212] x 100 = -39.15%
Formula
Percentage change = [(129 - 212) / 212] x 100
Subtract the new number by the original number
129 - 212 = -83
-83 ÷ 212 = -0.3915094339622642
-0.3915094339622642 x 100 = -39.15%