-48.67% is the change from 830 to 426
Calculation steps:
[( 426 - 830 ) ÷ 830] x 100 = -48.67%
Formula
Percentage change = [(426 - 830) / 830] x 100
Subtract the new number by the original number
426 - 830 = -404
-404 ÷ 830 = -0.4867469879518072
-0.4867469879518072 x 100 = -48.67%