-90.76% is the change from 855 to 79
Calculation steps:
[( 79 - 855 ) ÷ 855] x 100 = -90.76%
Formula
Percentage change = [(79 - 855) / 855] x 100
Subtract the new number by the original number
79 - 855 = -776
-776 ÷ 855 = -0.9076023391812865
-0.9076023391812865 x 100 = -90.76%