-87.16% is the change from 623 to 80
Calculation steps:
[( 80 - 623 ) ÷ 623] x 100 = -87.16%
Formula
Percentage change = [(80 - 623) / 623] x 100
Subtract the new number by the original number
80 - 623 = -543
-543 ÷ 623 = -0.8715890850722311
-0.8715890850722311 x 100 = -87.16%