-7.44% is the change from 309 to 286
Calculation steps:
[( 286 - 309 ) ÷ 309] x 100 = -7.44%
Formula
Percentage change = [(286 - 309) / 309] x 100
Subtract the new number by the original number
286 - 309 = -23
-23 ÷ 309 = -0.0744336569579288
-0.0744336569579288 x 100 = -7.44%