-48.34% is the change from 813 to 420
Calculation steps:
[( 420 - 813 ) ÷ 813] x 100 = -48.34%
Formula
Percentage change = [(420 - 813) / 813] x 100
Subtract the new number by the original number
420 - 813 = -393
-393 ÷ 813 = -0.4833948339483395
-0.4833948339483395 x 100 = -48.34%