-9.59% is the change from 688 to 622
Calculation steps:
[( 622 - 688 ) ÷ 688] x 100 = -9.59%
Formula
Percentage change = [(622 - 688) / 688] x 100
Subtract the new number by the original number
622 - 688 = -66
-66 ÷ 688 = -0.09593023255813954
-0.09593023255813954 x 100 = -9.59%