-83.07% is the change from 319 to 54
Calculation steps:
[( 54 - 319 ) ÷ 319] x 100 = -83.07%
Formula
Percentage change = [(54 - 319) / 319] x 100
Subtract the new number by the original number
54 - 319 = -265
-265 ÷ 319 = -0.8307210031347962
-0.8307210031347962 x 100 = -83.07%