-22.12% is the change from 669 to 521
Calculation steps:
[( 521 - 669 ) ÷ 669] x 100 = -22.12%
Formula
Percentage change = [(521 - 669) / 669] x 100
Subtract the new number by the original number
521 - 669 = -148
-148 ÷ 669 = -0.22122571001494767
-0.22122571001494767 x 100 = -22.12%