-13.87% is the change from 310 to 267
Calculation steps:
[( 267 - 310 ) ÷ 310] x 100 = -13.87%
Formula
Percentage change = [(267 - 310) / 310] x 100
Subtract the new number by the original number
267 - 310 = -43
-43 ÷ 310 = -0.13870967741935483
-0.13870967741935483 x 100 = -13.87%