-75.73% is the change from 342 to 83
Calculation steps:
[( 83 - 342 ) ÷ 342] x 100 = -75.73%
Formula
Percentage change = [(83 - 342) / 342] x 100
Subtract the new number by the original number
83 - 342 = -259
-259 ÷ 342 = -0.7573099415204678
-0.7573099415204678 x 100 = -75.73%