-97.5% is the change from 920 to 23
Calculation steps:
[( 23 - 920 ) ÷ 920] x 100 = -97.5%
Formula
Percentage change = [(23 - 920) / 920] x 100
Subtract the new number by the original number
23 - 920 = -897
-897 ÷ 920 = -0.975
-0.975 x 100 = -97.5%
Example