-15.05% is the change from 319 to 271
Calculation steps:
[( 271 - 319 ) ÷ 319] x 100 = -15.05%
Formula
Percentage change = [(271 - 319) / 319] x 100
Subtract the new number by the original number
271 - 319 = -48
-48 ÷ 319 = -0.15047021943573669
-0.15047021943573669 x 100 = -15.05%