-50.06% is the change from 847 to 423
Calculation steps:
[( 423 - 847 ) ÷ 847] x 100 = -50.06%
Formula
Percentage change = [(423 - 847) / 847] x 100
Subtract the new number by the original number
423 - 847 = -424
-424 ÷ 847 = -0.500590318772137
-0.500590318772137 x 100 = -50.06%