-3.55% is the change from 310 to 299
Calculation steps:
[( 299 - 310 ) ÷ 310] x 100 = -3.55%
Formula
Percentage change = [(299 - 310) / 310] x 100
Subtract the new number by the original number
299 - 310 = -11
-11 ÷ 310 = -0.035483870967741936
-0.035483870967741936 x 100 = -3.55%