-97.76% is the change from 937 to 21
Calculation steps:
[( 21 - 937 ) ÷ 937] x 100 = -97.76%
Formula
Percentage change = [(21 - 937) / 937] x 100
Subtract the new number by the original number
21 - 937 = -916
-916 ÷ 937 = -0.9775880469583778
-0.9775880469583778 x 100 = -97.76%