-17.55% is the change from 638 to 526
Calculation steps:
[( 526 - 638 ) ÷ 638] x 100 = -17.55%
Formula
Percentage change = [(526 - 638) / 638] x 100
Subtract the new number by the original number
526 - 638 = -112
-112 ÷ 638 = -0.1755485893416928
-0.1755485893416928 x 100 = -17.55%