-52.41% is the change from 830 to 395
Calculation steps:
[( 395 - 830 ) ÷ 830] x 100 = -52.41%
Formula
Percentage change = [(395 - 830) / 830] x 100
Subtract the new number by the original number
395 - 830 = -435
-435 ÷ 830 = -0.5240963855421686
-0.5240963855421686 x 100 = -52.41%