-80.43% is the change from 644 to 126
Calculation steps:
[( 126 - 644 ) ÷ 644] x 100 = -80.43%
Formula
Percentage change = [(126 - 644) / 644] x 100
Subtract the new number by the original number
126 - 644 = -518
-518 ÷ 644 = -0.8043478260869565
-0.8043478260869565 x 100 = -80.43%