-50% is the change from 462 to 231
Calculation steps:
[( 231 - 462 ) ÷ 462] x 100 = -50%
Formula
Percentage change = [(231 - 462) / 462] x 100
Subtract the new number by the original number
231 - 462 = -231
-231 ÷ 462 = -0.5
-0.5 x 100 = -50%
Example