-96.71% is the change from 851 to 28
Calculation steps:
[( 28 - 851 ) ÷ 851] x 100 = -96.71%
Formula
Percentage change = [(28 - 851) / 851] x 100
Subtract the new number by the original number
28 - 851 = -823
-823 ÷ 851 = -0.9670975323149236
-0.9670975323149236 x 100 = -96.71%