-10.29% is the change from 311 to 279
Calculation steps:
[( 279 - 311 ) ÷ 311] x 100 = -10.29%
Formula
Percentage change = [(279 - 311) / 311] x 100
Subtract the new number by the original number
279 - 311 = -32
-32 ÷ 311 = -0.10289389067524116
-0.10289389067524116 x 100 = -10.29%