-17.53% is the change from 639 to 527
Calculation steps:
[( 527 - 639 ) ÷ 639] x 100 = -17.53%
Formula
Percentage change = [(527 - 639) / 639] x 100
Subtract the new number by the original number
527 - 639 = -112
-112 ÷ 639 = -0.1752738654147105
-0.1752738654147105 x 100 = -17.53%