-58.84% is the change from 831 to 342
Calculation steps:
[( 342 - 831 ) ÷ 831] x 100 = -58.84%
Formula
Percentage change = [(342 - 831) / 831] x 100
Subtract the new number by the original number
342 - 831 = -489
-489 ÷ 831 = -0.5884476534296029
-0.5884476534296029 x 100 = -58.84%