-99.1% is the change from 775 to 7
Calculation steps:
[( 7 - 775 ) ÷ 775] x 100 = -99.1%
Formula
Percentage change = [(7 - 775) / 775] x 100
Subtract the new number by the original number
7 - 775 = -768
-768 ÷ 775 = -0.9909677419354839
-0.9909677419354839 x 100 = -99.1%