-83.49% is the change from 636 to 105
Calculation steps:
[( 105 - 636 ) ÷ 636] x 100 = -83.49%
Formula
Percentage change = [(105 - 636) / 636] x 100
Subtract the new number by the original number
105 - 636 = -531
-531 ÷ 636 = -0.8349056603773585
-0.8349056603773585 x 100 = -83.49%