-17.78% is the change from 641 to 527
Calculation steps:
[( 527 - 641 ) ÷ 641] x 100 = -17.78%
Formula
Percentage change = [(527 - 641) / 641] x 100
Subtract the new number by the original number
527 - 641 = -114
-114 ÷ 641 = -0.17784711388455537
-0.17784711388455537 x 100 = -17.78%