-9.65% is the change from 311 to 281
Calculation steps:
[( 281 - 311 ) ÷ 311] x 100 = -9.65%
Formula
Percentage change = [(281 - 311) / 311] x 100
Subtract the new number by the original number
281 - 311 = -30
-30 ÷ 311 = -0.09646302250803858
-0.09646302250803858 x 100 = -9.65%