-71.79% is the change from 319 to 90
Calculation steps:
[( 90 - 319 ) ÷ 319] x 100 = -71.79%
Formula
Percentage change = [(90 - 319) / 319] x 100
Subtract the new number by the original number
90 - 319 = -229
-229 ÷ 319 = -0.7178683385579937
-0.7178683385579937 x 100 = -71.79%