-16.69% is the change from 641 to 534
Calculation steps:
[( 534 - 641 ) ÷ 641] x 100 = -16.69%
Formula
Percentage change = [(534 - 641) / 641] x 100
Subtract the new number by the original number
534 - 641 = -107
-107 ÷ 641 = -0.1669266770670827
-0.1669266770670827 x 100 = -16.69%