-18.13% is the change from 491 to 402
Calculation steps:
[( 402 - 491 ) ÷ 491] x 100 = -18.13%
Formula
Percentage change = [(402 - 491) / 491] x 100
Subtract the new number by the original number
402 - 491 = -89
-89 ÷ 491 = -0.18126272912423624
-0.18126272912423624 x 100 = -18.13%