-9.87% is the change from 689 to 621
Calculation steps:
[( 621 - 689 ) ÷ 689] x 100 = -9.87%
Formula
Percentage change = [(621 - 689) / 689] x 100
Subtract the new number by the original number
621 - 689 = -68
-68 ÷ 689 = -0.09869375907111756
-0.09869375907111756 x 100 = -9.87%