-56.23% is the change from 642 to 281
Calculation steps:
[( 281 - 642 ) ÷ 642] x 100 = -56.23%
Formula
Percentage change = [(281 - 642) / 642] x 100
Subtract the new number by the original number
281 - 642 = -361
-361 ÷ 642 = -0.5623052959501558
-0.5623052959501558 x 100 = -56.23%