-2.14% is the change from 654 to 640
Calculation steps:
[( 640 - 654 ) ÷ 654] x 100 = -2.14%
Formula
Percentage change = [(640 - 654) / 654] x 100
Subtract the new number by the original number
640 - 654 = -14
-14 ÷ 654 = -0.021406727828746176
-0.021406727828746176 x 100 = -2.14%