-91.36% is the change from 324 to 28
Calculation steps:
[( 28 - 324 ) ÷ 324] x 100 = -91.36%
Formula
Percentage change = [(28 - 324) / 324] x 100
Subtract the new number by the original number
28 - 324 = -296
-296 ÷ 324 = -0.9135802469135802
-0.9135802469135802 x 100 = -91.36%