-67.03% is the change from 643 to 212
Calculation steps:
[( 212 - 643 ) ÷ 643] x 100 = -67.03%
Formula
Percentage change = [(212 - 643) / 643] x 100
Subtract the new number by the original number
212 - 643 = -431
-431 ÷ 643 = -0.6702954898911353
-0.6702954898911353 x 100 = -67.03%