-67.03% is the change from 634 to 209
Calculation steps:
[( 209 - 634 ) ÷ 634] x 100 = -67.03%
Formula
Percentage change = [(209 - 634) / 634] x 100
Subtract the new number by the original number
209 - 634 = -425
-425 ÷ 634 = -0.6703470031545742
-0.6703470031545742 x 100 = -67.03%