-28.53% is the change from 319 to 228
Calculation steps:
[( 228 - 319 ) ÷ 319] x 100 = -28.53%
Formula
Percentage change = [(228 - 319) / 319] x 100
Subtract the new number by the original number
228 - 319 = -91
-91 ÷ 319 = -0.2852664576802508
-0.2852664576802508 x 100 = -28.53%