-21.75% is the change from 662 to 518
Calculation steps:
[( 518 - 662 ) ÷ 662] x 100 = -21.75%
Formula
Percentage change = [(518 - 662) / 662] x 100
Subtract the new number by the original number
518 - 662 = -144
-144 ÷ 662 = -0.2175226586102719
-0.2175226586102719 x 100 = -21.75%