-47.97% is the change from 813 to 423
Calculation steps:
[( 423 - 813 ) ÷ 813] x 100 = -47.97%
Formula
Percentage change = [(423 - 813) / 813] x 100
Subtract the new number by the original number
423 - 813 = -390
-390 ÷ 813 = -0.4797047970479705
-0.4797047970479705 x 100 = -47.97%