-96.58% is the change from 877 to 30
Calculation steps:
[( 30 - 877 ) ÷ 877] x 100 = -96.58%
Formula
Percentage change = [(30 - 877) / 877] x 100
Subtract the new number by the original number
30 - 877 = -847
-847 ÷ 877 = -0.9657924743443558
-0.9657924743443558 x 100 = -96.58%