-79.3% is the change from 401 to 83
Calculation steps:
[( 83 - 401 ) ÷ 401] x 100 = -79.3%
Formula
Percentage change = [(83 - 401) / 401] x 100
Subtract the new number by the original number
83 - 401 = -318
-318 ÷ 401 = -0.7930174563591023
-0.7930174563591023 x 100 = -79.3%