29.68% is the change from 310 to 402
Calculation steps:
[( 402 - 310 ) ÷ 310] x 100 = 29.68%
Formula
Percentage change = [(402 - 310) / 310] x 100
Subtract the new number by the original number
402 - 310 = 92
92 ÷ 310 = 0.2967741935483871
0.2967741935483871 x 100 = 29.68%