-97.71% is the change from 916 to 21
Calculation steps:
[( 21 - 916 ) ÷ 916] x 100 = -97.71%
Formula
Percentage change = [(21 - 916) / 916] x 100
Subtract the new number by the original number
21 - 916 = -895
-895 ÷ 916 = -0.9770742358078602
-0.9770742358078602 x 100 = -97.71%