-18.33% is the change from 491 to 401
Calculation steps:
[( 401 - 491 ) ÷ 491] x 100 = -18.33%
Formula
Percentage change = [(401 - 491) / 491] x 100
Subtract the new number by the original number
401 - 491 = -90
-90 ÷ 491 = -0.18329938900203666
-0.18329938900203666 x 100 = -18.33%