-40.7% is the change from 828 to 491
Calculation steps:
[( 491 - 828 ) ÷ 828] x 100 = -40.7%
Formula
Percentage change = [(491 - 828) / 828] x 100
Subtract the new number by the original number
491 - 828 = -337
-337 ÷ 828 = -0.40700483091787437
-0.40700483091787437 x 100 = -40.7%