-22.27% is the change from 669 to 520
Calculation steps:
[( 520 - 669 ) ÷ 669] x 100 = -22.27%
Formula
Percentage change = [(520 - 669) / 669] x 100
Subtract the new number by the original number
520 - 669 = -149
-149 ÷ 669 = -0.2227204783258595
-0.2227204783258595 x 100 = -22.27%