-35.82% is the change from 670 to 430
Calculation steps:
[( 430 - 670 ) ÷ 670] x 100 = -35.82%
Formula
Percentage change = [(430 - 670) / 670] x 100
Subtract the new number by the original number
430 - 670 = -240
-240 ÷ 670 = -0.3582089552238806
-0.3582089552238806 x 100 = -35.82%