-91.13% is the change from 891 to 79
Calculation steps:
[( 79 - 891 ) ÷ 891] x 100 = -91.13%
Formula
Percentage change = [(79 - 891) / 891] x 100
Subtract the new number by the original number
79 - 891 = -812
-812 ÷ 891 = -0.9113355780022446
-0.9113355780022446 x 100 = -91.13%