-93.02% is the change from 129 to 9
Calculation steps:
[( 9 - 129 ) ÷ 129] x 100 = -93.02%
Formula
Percentage change = [(9 - 129) / 129] x 100
Subtract the new number by the original number
9 - 129 = -120
-120 ÷ 129 = -0.9302325581395349
-0.9302325581395349 x 100 = -93.02%