-85.51% is the change from 628 to 91
Calculation steps:
[( 91 - 628 ) ÷ 628] x 100 = -85.51%
Formula
Percentage change = [(91 - 628) / 628] x 100
Subtract the new number by the original number
91 - 628 = -537
-537 ÷ 628 = -0.8550955414012739
-0.8550955414012739 x 100 = -85.51%