-87.1% is the change from 775 to 100
Calculation steps:
[( 100 - 775 ) ÷ 775] x 100 = -87.1%
Formula
Percentage change = [(100 - 775) / 775] x 100
Subtract the new number by the original number
100 - 775 = -675
-675 ÷ 775 = -0.8709677419354839
-0.8709677419354839 x 100 = -87.1%