-83.72% is the change from 430 to 70
Calculation steps:
[( 70 - 430 ) ÷ 430] x 100 = -83.72%
Formula
Percentage change = [(70 - 430) / 430] x 100
Subtract the new number by the original number
70 - 430 = -360
-360 ÷ 430 = -0.8372093023255814
-0.8372093023255814 x 100 = -83.72%