-12.83% is the change from 491 to 428
Calculation steps:
[( 428 - 491 ) ÷ 491] x 100 = -12.83%
Formula
Percentage change = [(428 - 491) / 491] x 100
Subtract the new number by the original number
428 - 491 = -63
-63 ÷ 491 = -0.12830957230142567
-0.12830957230142567 x 100 = -12.83%