-1.25% is the change from 319 to 315
Calculation steps:
[( 315 - 319 ) ÷ 319] x 100 = -1.25%
Formula
Percentage change = [(315 - 319) / 319] x 100
Subtract the new number by the original number
315 - 319 = -4
-4 ÷ 319 = -0.012539184952978056
-0.012539184952978056 x 100 = -1.25%