-23.08% is the change from 403 to 310
Calculation steps:
[( 310 - 403 ) ÷ 403] x 100 = -23.08%
Formula
Percentage change = [(310 - 403) / 403] x 100
Subtract the new number by the original number
310 - 403 = -93
-93 ÷ 403 = -0.23076923076923078
-0.23076923076923078 x 100 = -23.08%