28.85% is the change from 312 to 402
Calculation steps:
[( 402 - 312 ) ÷ 312] x 100 = 28.85%
Formula
Percentage change = [(402 - 312) / 312] x 100
Subtract the new number by the original number
402 - 312 = 90
90 ÷ 312 = 0.28846153846153844
0.28846153846153844 x 100 = 28.85%