-78.58% is the change from 649 to 139
Calculation steps:
[( 139 - 649 ) ÷ 649] x 100 = -78.58%
Formula
Percentage change = [(139 - 649) / 649] x 100
Subtract the new number by the original number
139 - 649 = -510
-510 ÷ 649 = -0.785824345146379
-0.785824345146379 x 100 = -78.58%