-0.61% is the change from 491 to 488
Calculation steps:
[( 488 - 491 ) ÷ 491] x 100 = -0.61%
Formula
Percentage change = [(488 - 491) / 491] x 100
Subtract the new number by the original number
488 - 491 = -3
-3 ÷ 491 = -0.006109979633401222
-0.006109979633401222 x 100 = -0.61%