-15.09% is the change from 643 to 546
Calculation steps:
[( 546 - 643 ) ÷ 643] x 100 = -15.09%
Formula
Percentage change = [(546 - 643) / 643] x 100
Subtract the new number by the original number
546 - 643 = -97
-97 ÷ 643 = -0.15085536547433903
-0.15085536547433903 x 100 = -15.09%