-76.81% is the change from 815 to 189
Calculation steps:
[( 189 - 815 ) ÷ 815] x 100 = -76.81%
Formula
Percentage change = [(189 - 815) / 815] x 100
Subtract the new number by the original number
189 - 815 = -626
-626 ÷ 815 = -0.7680981595092025
-0.7680981595092025 x 100 = -76.81%