-9.4% is the change from 638 to 578
Calculation steps:
[( 578 - 638 ) ÷ 638] x 100 = -9.4%
Formula
Percentage change = [(578 - 638) / 638] x 100
Subtract the new number by the original number
578 - 638 = -60
-60 ÷ 638 = -0.09404388714733543
-0.09404388714733543 x 100 = -9.4%