-2.3% is the change from 305 to 298
Calculation steps:
[( 298 - 305 ) ÷ 305] x 100 = -2.3%
Formula
Percentage change = [(298 - 305) / 305] x 100
Subtract the new number by the original number
298 - 305 = -7
-7 ÷ 305 = -0.022950819672131147
-0.022950819672131147 x 100 = -2.3%