-61.03% is the change from 816 to 318
Calculation steps:
[( 318 - 816 ) ÷ 816] x 100 = -61.03%
Formula
Percentage change = [(318 - 816) / 816] x 100
Subtract the new number by the original number
318 - 816 = -498
-498 ÷ 816 = -0.6102941176470589
-0.6102941176470589 x 100 = -61.03%