-21.45% is the change from 662 to 520
Calculation steps:
[( 520 - 662 ) ÷ 662] x 100 = -21.45%
Formula
Percentage change = [(520 - 662) / 662] x 100
Subtract the new number by the original number
520 - 662 = -142
-142 ÷ 662 = -0.21450151057401812
-0.21450151057401812 x 100 = -21.45%