-42.79% is the change from 423 to 242
Calculation steps:
[( 242 - 423 ) ÷ 423] x 100 = -42.79%
Formula
Percentage change = [(242 - 423) / 423] x 100
Subtract the new number by the original number
242 - 423 = -181
-181 ÷ 423 = -0.42789598108747046
-0.42789598108747046 x 100 = -42.79%