-83.38% is the change from 776 to 129
Calculation steps:
[( 129 - 776 ) ÷ 776] x 100 = -83.38%
Formula
Percentage change = [(129 - 776) / 776] x 100
Subtract the new number by the original number
129 - 776 = -647
-647 ÷ 776 = -0.8337628865979382
-0.8337628865979382 x 100 = -83.38%