-89.9% is the change from 624 to 63
Calculation steps:
[( 63 - 624 ) ÷ 624] x 100 = -89.9%
Formula
Percentage change = [(63 - 624) / 624] x 100
Subtract the new number by the original number
63 - 624 = -561
-561 ÷ 624 = -0.8990384615384616
-0.8990384615384616 x 100 = -89.9%