-67.19% is the change from 643 to 211
Calculation steps:
[( 211 - 643 ) ÷ 643] x 100 = -67.19%
Formula
Percentage change = [(211 - 643) / 643] x 100
Subtract the new number by the original number
211 - 643 = -432
-432 ÷ 643 = -0.671850699844479
-0.671850699844479 x 100 = -67.19%