-97.5% is the change from 921 to 23
Calculation steps:
[( 23 - 921 ) ÷ 921] x 100 = -97.5%
Formula
Percentage change = [(23 - 921) / 921] x 100
Subtract the new number by the original number
23 - 921 = -898
-898 ÷ 921 = -0.9750271444082519
-0.9750271444082519 x 100 = -97.5%