-24.36% is the change from 669 to 506
Calculation steps:
[( 506 - 669 ) ÷ 669] x 100 = -24.36%
Formula
Percentage change = [(506 - 669) / 669] x 100
Subtract the new number by the original number
506 - 669 = -163
-163 ÷ 669 = -0.2436472346786248
-0.2436472346786248 x 100 = -24.36%