-84.24% is the change from 628 to 99
Calculation steps:
[( 99 - 628 ) ÷ 628] x 100 = -84.24%
Formula
Percentage change = [(99 - 628) / 628] x 100
Subtract the new number by the original number
99 - 628 = -529
-529 ÷ 628 = -0.8423566878980892
-0.8423566878980892 x 100 = -84.24%