-26.79% is the change from 851 to 623
Calculation steps:
[( 623 - 851 ) ÷ 851] x 100 = -26.79%
Formula
Percentage change = [(623 - 851) / 851] x 100
Subtract the new number by the original number
623 - 851 = -228
-228 ÷ 851 = -0.2679200940070505
-0.2679200940070505 x 100 = -26.79%