-34.21% is the change from 684 to 450
Calculation steps:
[( 450 - 684 ) ÷ 684] x 100 = -34.21%
Formula
Percentage change = [(450 - 684) / 684] x 100
Subtract the new number by the original number
450 - 684 = -234
-234 ÷ 684 = -0.34210526315789475
-0.34210526315789475 x 100 = -34.21%