-81.37% is the change from 644 to 120
Calculation steps:
[( 120 - 644 ) ÷ 644] x 100 = -81.37%
Formula
Percentage change = [(120 - 644) / 644] x 100
Subtract the new number by the original number
120 - 644 = -524
-524 ÷ 644 = -0.8136645962732919
-0.8136645962732919 x 100 = -81.37%