-85.6% is the change from 632 to 91
Calculation steps:
[( 91 - 632 ) ÷ 632] x 100 = -85.6%
Formula
Percentage change = [(91 - 632) / 632] x 100
Subtract the new number by the original number
91 - 632 = -541
-541 ÷ 632 = -0.8560126582278481
-0.8560126582278481 x 100 = -85.6%