-63.88% is the change from 861 to 311
Calculation steps:
[( 311 - 861 ) ÷ 861] x 100 = -63.88%
Formula
Percentage change = [(311 - 861) / 861] x 100
Subtract the new number by the original number
311 - 861 = -550
-550 ÷ 861 = -0.6387921022067363
-0.6387921022067363 x 100 = -63.88%