-8.35% is the change from 491 to 450
Calculation steps:
[( 450 - 491 ) ÷ 491] x 100 = -8.35%
Formula
Percentage change = [(450 - 491) / 491] x 100
Subtract the new number by the original number
450 - 491 = -41
-41 ÷ 491 = -0.0835030549898167
-0.0835030549898167 x 100 = -8.35%