-61.7% is the change from 812 to 311
Calculation steps:
[( 311 - 812 ) ÷ 812] x 100 = -61.7%
Formula
Percentage change = [(311 - 812) / 812] x 100
Subtract the new number by the original number
311 - 812 = -501
-501 ÷ 812 = -0.6169950738916257
-0.6169950738916257 x 100 = -61.7%