-2.1% is the change from 668 to 654
Calculation steps:
[( 654 - 668 ) ÷ 668] x 100 = -2.1%
Formula
Percentage change = [(654 - 668) / 668] x 100
Subtract the new number by the original number
654 - 668 = -14
-14 ÷ 668 = -0.020958083832335328
-0.020958083832335328 x 100 = -2.1%