-65.99% is the change from 644 to 219
Calculation steps:
[( 219 - 644 ) ÷ 644] x 100 = -65.99%
Formula
Percentage change = [(219 - 644) / 644] x 100
Subtract the new number by the original number
219 - 644 = -425
-425 ÷ 644 = -0.6599378881987578
-0.6599378881987578 x 100 = -65.99%