-17.71% is the change from 638 to 525
Calculation steps:
[( 525 - 638 ) ÷ 638] x 100 = -17.71%
Formula
Percentage change = [(525 - 638) / 638] x 100
Subtract the new number by the original number
525 - 638 = -113
-113 ÷ 638 = -0.17711598746081506
-0.17711598746081506 x 100 = -17.71%