-22.34% is the change from 819 to 636
Calculation steps:
[( 636 - 819 ) ÷ 819] x 100 = -22.34%
Formula
Percentage change = [(636 - 819) / 819] x 100
Subtract the new number by the original number
636 - 819 = -183
-183 ÷ 819 = -0.22344322344322345
-0.22344322344322345 x 100 = -22.34%