-97.78% is the change from 991 to 22
Calculation steps:
[( 22 - 991 ) ÷ 991] x 100 = -97.78%
Formula
Percentage change = [(22 - 991) / 991] x 100
Subtract the new number by the original number
22 - 991 = -969
-969 ÷ 991 = -0.9778002018163471
-0.9778002018163471 x 100 = -97.78%