-57.59% is the change from 830 to 352
Calculation steps:
[( 352 - 830 ) ÷ 830] x 100 = -57.59%
Formula
Percentage change = [(352 - 830) / 830] x 100
Subtract the new number by the original number
352 - 830 = -478
-478 ÷ 830 = -0.5759036144578313
-0.5759036144578313 x 100 = -57.59%