-84.86% is the change from 654 to 99
Calculation steps:
[( 99 - 654 ) ÷ 654] x 100 = -84.86%
Formula
Percentage change = [(99 - 654) / 654] x 100
Subtract the new number by the original number
99 - 654 = -555
-555 ÷ 654 = -0.8486238532110092
-0.8486238532110092 x 100 = -84.86%