-79.75% is the change from 316 to 64
Calculation steps:
[( 64 - 316 ) ÷ 316] x 100 = -79.75%
Formula
Percentage change = [(64 - 316) / 316] x 100
Subtract the new number by the original number
64 - 316 = -252
-252 ÷ 316 = -0.7974683544303798
-0.7974683544303798 x 100 = -79.75%