-2.26% is the change from 310 to 303
Calculation steps:
[( 303 - 310 ) ÷ 310] x 100 = -2.26%
Formula
Percentage change = [(303 - 310) / 310] x 100
Subtract the new number by the original number
303 - 310 = -7
-7 ÷ 310 = -0.02258064516129032
-0.02258064516129032 x 100 = -2.26%