-21.08% is the change from 669 to 528
Calculation steps:
[( 528 - 669 ) ÷ 669] x 100 = -21.08%
Formula
Percentage change = [(528 - 669) / 669] x 100
Subtract the new number by the original number
528 - 669 = -141
-141 ÷ 669 = -0.21076233183856502
-0.21076233183856502 x 100 = -21.08%