-47.91% is the change from 812 to 423
Calculation steps:
[( 423 - 812 ) ÷ 812] x 100 = -47.91%
Formula
Percentage change = [(423 - 812) / 812] x 100
Subtract the new number by the original number
423 - 812 = -389
-389 ÷ 812 = -0.479064039408867
-0.479064039408867 x 100 = -47.91%