-61.58% is the change from 812 to 312
Calculation steps:
[( 312 - 812 ) ÷ 812] x 100 = -61.58%
Formula
Percentage change = [(312 - 812) / 812] x 100
Subtract the new number by the original number
312 - 812 = -500
-500 ÷ 812 = -0.6157635467980296
-0.6157635467980296 x 100 = -61.58%