-79.4% is the change from 403 to 83
Calculation steps:
[( 83 - 403 ) ÷ 403] x 100 = -79.4%
Formula
Percentage change = [(83 - 403) / 403] x 100
Subtract the new number by the original number
83 - 403 = -320
-320 ÷ 403 = -0.794044665012407
-0.794044665012407 x 100 = -79.4%