-78.16% is the change from 641 to 140
Calculation steps:
[( 140 - 641 ) ÷ 641] x 100 = -78.16%
Formula
Percentage change = [(140 - 641) / 641] x 100
Subtract the new number by the original number
140 - 641 = -501
-501 ÷ 641 = -0.781591263650546
-0.781591263650546 x 100 = -78.16%