-8.41% is the change from 678 to 621
Calculation steps:
[( 621 - 678 ) ÷ 678] x 100 = -8.41%
Formula
Percentage change = [(621 - 678) / 678] x 100
Subtract the new number by the original number
621 - 678 = -57
-57 ÷ 678 = -0.084070796460177
-0.084070796460177 x 100 = -8.41%