-21.35% is the change from 665 to 523
Calculation steps:
[( 523 - 665 ) ÷ 665] x 100 = -21.35%
Formula
Percentage change = [(523 - 665) / 665] x 100
Subtract the new number by the original number
523 - 665 = -142
-142 ÷ 665 = -0.21353383458646616
-0.21353383458646616 x 100 = -21.35%