-21.72% is the change from 396 to 310
Calculation steps:
[( 310 - 396 ) ÷ 396] x 100 = -21.72%
Formula
Percentage change = [(310 - 396) / 396] x 100
Subtract the new number by the original number
310 - 396 = -86
-86 ÷ 396 = -0.21717171717171718
-0.21717171717171718 x 100 = -21.72%