-83.97% is the change from 624 to 100
Calculation steps:
[( 100 - 624 ) ÷ 624] x 100 = -83.97%
Formula
Percentage change = [(100 - 624) / 624] x 100
Subtract the new number by the original number
100 - 624 = -524
-524 ÷ 624 = -0.8397435897435898
-0.8397435897435898 x 100 = -83.97%