-34.31% is the change from 685 to 450
Calculation steps:
[( 450 - 685 ) ÷ 685] x 100 = -34.31%
Formula
Percentage change = [(450 - 685) / 685] x 100
Subtract the new number by the original number
450 - 685 = -235
-235 ÷ 685 = -0.34306569343065696
-0.34306569343065696 x 100 = -34.31%