-85.23% is the change from 677 to 100
Calculation steps:
[( 100 - 677 ) ÷ 677] x 100 = -85.23%
Formula
Percentage change = [(100 - 677) / 677] x 100
Subtract the new number by the original number
100 - 677 = -577
-577 ÷ 677 = -0.8522895125553914
-0.8522895125553914 x 100 = -85.23%