-39.73% is the change from 813 to 490
Calculation steps:
[( 490 - 813 ) ÷ 813] x 100 = -39.73%
Formula
Percentage change = [(490 - 813) / 813] x 100
Subtract the new number by the original number
490 - 813 = -323
-323 ÷ 813 = -0.3972939729397294
-0.3972939729397294 x 100 = -39.73%