-17.63% is the change from 641 to 528
Calculation steps:
[( 528 - 641 ) ÷ 641] x 100 = -17.63%
Formula
Percentage change = [(528 - 641) / 641] x 100
Subtract the new number by the original number
528 - 641 = -113
-113 ÷ 641 = -0.17628705148205928
-0.17628705148205928 x 100 = -17.63%