-89.35% is the change from 479 to 51
Calculation steps:
[( 51 - 479 ) ÷ 479] x 100 = -89.35%
Formula
Percentage change = [(51 - 479) / 479] x 100
Subtract the new number by the original number
51 - 479 = -428
-428 ÷ 479 = -0.8935281837160751
-0.8935281837160751 x 100 = -89.35%