-3.87% is the change from 310 to 298
Calculation steps:
[( 298 - 310 ) ÷ 310] x 100 = -3.87%
Formula
Percentage change = [(298 - 310) / 310] x 100
Subtract the new number by the original number
298 - 310 = -12
-12 ÷ 310 = -0.03870967741935484
-0.03870967741935484 x 100 = -3.87%