-48.22% is the change from 813 to 421
Calculation steps:
[( 421 - 813 ) ÷ 813] x 100 = -48.22%
Formula
Percentage change = [(421 - 813) / 813] x 100
Subtract the new number by the original number
421 - 813 = -392
-392 ÷ 813 = -0.4821648216482165
-0.4821648216482165 x 100 = -48.22%