-0.94% is the change from 318 to 315
Calculation steps:
[( 315 - 318 ) ÷ 318] x 100 = -0.94%
Formula
Percentage change = [(315 - 318) / 318] x 100
Subtract the new number by the original number
315 - 318 = -3
-3 ÷ 318 = -0.009433962264150943
-0.009433962264150943 x 100 = -0.94%