-58.55% is the change from 830 to 344
Calculation steps:
[( 344 - 830 ) ÷ 830] x 100 = -58.55%
Formula
Percentage change = [(344 - 830) / 830] x 100
Subtract the new number by the original number
344 - 830 = -486
-486 ÷ 830 = -0.5855421686746988
-0.5855421686746988 x 100 = -58.55%