-80.19% is the change from 636 to 126
Calculation steps:
[( 126 - 636 ) ÷ 636] x 100 = -80.19%
Formula
Percentage change = [(126 - 636) / 636] x 100
Subtract the new number by the original number
126 - 636 = -510
-510 ÷ 636 = -0.8018867924528302
-0.8018867924528302 x 100 = -80.19%