-82.19% is the change from 640 to 114
Calculation steps:
[( 114 - 640 ) ÷ 640] x 100 = -82.19%
Formula
Percentage change = [(114 - 640) / 640] x 100
Subtract the new number by the original number
114 - 640 = -526
-526 ÷ 640 = -0.821875
-0.821875 x 100 = -82.19%