-97.68% is the change from 907 to 21
Calculation steps:
[( 21 - 907 ) ÷ 907] x 100 = -97.68%
Formula
Percentage change = [(21 - 907) / 907] x 100
Subtract the new number by the original number
21 - 907 = -886
-886 ÷ 907 = -0.9768467475192943
-0.9768467475192943 x 100 = -97.68%