-63.48% is the change from 638 to 233
Calculation steps:
[( 233 - 638 ) ÷ 638] x 100 = -63.48%
Formula
Percentage change = [(233 - 638) / 638] x 100
Subtract the new number by the original number
233 - 638 = -405
-405 ÷ 638 = -0.6347962382445141
-0.6347962382445141 x 100 = -63.48%