-65.99% is the change from 641 to 218
Calculation steps:
[( 218 - 641 ) ÷ 641] x 100 = -65.99%
Formula
Percentage change = [(218 - 641) / 641] x 100
Subtract the new number by the original number
218 - 641 = -423
-423 ÷ 641 = -0.6599063962558502
-0.6599063962558502 x 100 = -65.99%