-96.53% is the change from 662 to 23
Calculation steps:
[( 23 - 662 ) ÷ 662] x 100 = -96.53%
Formula
Percentage change = [(23 - 662) / 662] x 100
Subtract the new number by the original number
23 - 662 = -639
-639 ÷ 662 = -0.9652567975830816
-0.9652567975830816 x 100 = -96.53%