-96.56% is the change from 669 to 23
Calculation steps:
[( 23 - 669 ) ÷ 669] x 100 = -96.56%
Formula
Percentage change = [(23 - 669) / 669] x 100
Subtract the new number by the original number
23 - 669 = -646
-646 ÷ 669 = -0.9656203288490284
-0.9656203288490284 x 100 = -96.56%