-34.57% is the change from 486 to 318
Calculation steps:
[( 318 - 486 ) ÷ 486] x 100 = -34.57%
Formula
Percentage change = [(318 - 486) / 486] x 100
Subtract the new number by the original number
318 - 486 = -168
-168 ÷ 486 = -0.345679012345679
-0.345679012345679 x 100 = -34.57%