-47.35% is the change from 830 to 437
Calculation steps:
[( 437 - 830 ) ÷ 830] x 100 = -47.35%
Formula
Percentage change = [(437 - 830) / 830] x 100
Subtract the new number by the original number
437 - 830 = -393
-393 ÷ 830 = -0.4734939759036145
-0.4734939759036145 x 100 = -47.35%