-84.64% is the change from 319 to 49
Calculation steps:
[( 49 - 319 ) ÷ 319] x 100 = -84.64%
Formula
Percentage change = [(49 - 319) / 319] x 100
Subtract the new number by the original number
49 - 319 = -270
-270 ÷ 319 = -0.8463949843260188
-0.8463949843260188 x 100 = -84.64%