-95.3% is the change from 319 to 15
Calculation steps:
[( 15 - 319 ) ÷ 319] x 100 = -95.3%
Formula
Percentage change = [(15 - 319) / 319] x 100
Subtract the new number by the original number
15 - 319 = -304
-304 ÷ 319 = -0.9529780564263323
-0.9529780564263323 x 100 = -95.3%