-69.57% is the change from 230 to 70
Calculation steps:
[( 70 - 230 ) ÷ 230] x 100 = -69.57%
Formula
Percentage change = [(70 - 230) / 230] x 100
Subtract the new number by the original number
70 - 230 = -160
-160 ÷ 230 = -0.6956521739130435
-0.6956521739130435 x 100 = -69.57%