-80.74% is the change from 431 to 83
Calculation steps:
[( 83 - 431 ) ÷ 431] x 100 = -80.74%
Formula
Percentage change = [(83 - 431) / 431] x 100
Subtract the new number by the original number
83 - 431 = -348
-348 ÷ 431 = -0.8074245939675174
-0.8074245939675174 x 100 = -80.74%