-50% is the change from 862 to 431
Calculation steps:
[( 431 - 862 ) ÷ 862] x 100 = -50%
Formula
Percentage change = [(431 - 862) / 862] x 100
Subtract the new number by the original number
431 - 862 = -431
-431 ÷ 862 = -0.5
-0.5 x 100 = -50%
Example