-96.74% is the change from 921 to 30
Calculation steps:
[( 30 - 921 ) ÷ 921] x 100 = -96.74%
Formula
Percentage change = [(30 - 921) / 921] x 100
Subtract the new number by the original number
30 - 921 = -891
-891 ÷ 921 = -0.9674267100977199
-0.9674267100977199 x 100 = -96.74%