-61.76% is the change from 816 to 312
Calculation steps:
[( 312 - 816 ) ÷ 816] x 100 = -61.76%
Formula
Percentage change = [(312 - 816) / 816] x 100
Subtract the new number by the original number
312 - 816 = -504
-504 ÷ 816 = -0.6176470588235294
-0.6176470588235294 x 100 = -61.76%