-78.96% is the change from 656 to 138
Calculation steps:
[( 138 - 656 ) ÷ 656] x 100 = -78.96%
Formula
Percentage change = [(138 - 656) / 656] x 100
Subtract the new number by the original number
138 - 656 = -518
-518 ÷ 656 = -0.7896341463414634
-0.7896341463414634 x 100 = -78.96%