-68.09% is the change from 423 to 135
Calculation steps:
[( 135 - 423 ) ÷ 423] x 100 = -68.09%
Formula
Percentage change = [(135 - 423) / 423] x 100
Subtract the new number by the original number
135 - 423 = -288
-288 ÷ 423 = -0.6808510638297872
-0.6808510638297872 x 100 = -68.09%