-40.8% is the change from 424 to 251
Calculation steps:
[( 251 - 424 ) ÷ 424] x 100 = -40.8%
Formula
Percentage change = [(251 - 424) / 424] x 100
Subtract the new number by the original number
251 - 424 = -173
-173 ÷ 424 = -0.4080188679245283
-0.4080188679245283 x 100 = -40.8%