-78.55% is the change from 648 to 139
Calculation steps:
[( 139 - 648 ) ÷ 648] x 100 = -78.55%
Formula
Percentage change = [(139 - 648) / 648] x 100
Subtract the new number by the original number
139 - 648 = -509
-509 ÷ 648 = -0.7854938271604939
-0.7854938271604939 x 100 = -78.55%