-58.31% is the change from 830 to 346
Calculation steps:
[( 346 - 830 ) ÷ 830] x 100 = -58.31%
Formula
Percentage change = [(346 - 830) / 830] x 100
Subtract the new number by the original number
346 - 830 = -484
-484 ÷ 830 = -0.5831325301204819
-0.5831325301204819 x 100 = -58.31%