-45.65% is the change from 828 to 450
Calculation steps:
[( 450 - 828 ) ÷ 828] x 100 = -45.65%
Formula
Percentage change = [(450 - 828) / 828] x 100
Subtract the new number by the original number
450 - 828 = -378
-378 ÷ 828 = -0.45652173913043476
-0.45652173913043476 x 100 = -45.65%