-65.67% is the change from 638 to 219
Calculation steps:
[( 219 - 638 ) ÷ 638] x 100 = -65.67%
Formula
Percentage change = [(219 - 638) / 638] x 100
Subtract the new number by the original number
219 - 638 = -419
-419 ÷ 638 = -0.6567398119122257
-0.6567398119122257 x 100 = -65.67%