-1.83% is the change from 654 to 642
Calculation steps:
[( 642 - 654 ) ÷ 654] x 100 = -1.83%
Formula
Percentage change = [(642 - 654) / 654] x 100
Subtract the new number by the original number
642 - 654 = -12
-12 ÷ 654 = -0.01834862385321101
-0.01834862385321101 x 100 = -1.83%