-79.15% is the change from 398 to 83
Calculation steps:
[( 83 - 398 ) ÷ 398] x 100 = -79.15%
Formula
Percentage change = [(83 - 398) / 398] x 100
Subtract the new number by the original number
83 - 398 = -315
-315 ÷ 398 = -0.7914572864321608
-0.7914572864321608 x 100 = -79.15%