-80.88% is the change from 434 to 83
Calculation steps:
[( 83 - 434 ) ÷ 434] x 100 = -80.88%
Formula
Percentage change = [(83 - 434) / 434] x 100
Subtract the new number by the original number
83 - 434 = -351
-351 ÷ 434 = -0.8087557603686636
-0.8087557603686636 x 100 = -80.88%