-91.33% is the change from 819 to 71
Calculation steps:
[( 71 - 819 ) ÷ 819] x 100 = -91.33%
Formula
Percentage change = [(71 - 819) / 819] x 100
Subtract the new number by the original number
71 - 819 = -748
-748 ÷ 819 = -0.9133089133089133
-0.9133089133089133 x 100 = -91.33%