-21.9% is the change from 662 to 517
Calculation steps:
[( 517 - 662 ) ÷ 662] x 100 = -21.9%
Formula
Percentage change = [(517 - 662) / 662] x 100
Subtract the new number by the original number
517 - 662 = -145
-145 ÷ 662 = -0.2190332326283988
-0.2190332326283988 x 100 = -21.9%