-21.94% is the change from 319 to 249
Calculation steps:
[( 249 - 319 ) ÷ 319] x 100 = -21.94%
Formula
Percentage change = [(249 - 319) / 319] x 100
Subtract the new number by the original number
249 - 319 = -70
-70 ÷ 319 = -0.219435736677116
-0.219435736677116 x 100 = -21.94%