-78.27% is the change from 819 to 178
Calculation steps:
[( 178 - 819 ) ÷ 819] x 100 = -78.27%
Formula
Percentage change = [(178 - 819) / 819] x 100
Subtract the new number by the original number
178 - 819 = -641
-641 ÷ 819 = -0.7826617826617827
-0.7826617826617827 x 100 = -78.27%