-16.07% is the change from 641 to 538
Calculation steps:
[( 538 - 641 ) ÷ 641] x 100 = -16.07%
Formula
Percentage change = [(538 - 641) / 641] x 100
Subtract the new number by the original number
538 - 641 = -103
-103 ÷ 641 = -0.1606864274570983
-0.1606864274570983 x 100 = -16.07%