-21.52% is the change from 669 to 525
Calculation steps:
[( 525 - 669 ) ÷ 669] x 100 = -21.52%
Formula
Percentage change = [(525 - 669) / 669] x 100
Subtract the new number by the original number
525 - 669 = -144
-144 ÷ 669 = -0.21524663677130046
-0.21524663677130046 x 100 = -21.52%