-93.42% is the change from 319 to 21
Calculation steps:
[( 21 - 319 ) ÷ 319] x 100 = -93.42%
Formula
Percentage change = [(21 - 319) / 319] x 100
Subtract the new number by the original number
21 - 319 = -298
-298 ÷ 319 = -0.9341692789968652
-0.9341692789968652 x 100 = -93.42%