9.94% is the change from 312 to 343
Calculation steps:
[( 343 - 312 ) ÷ 312] x 100 = 9.94%
Formula
Percentage change = [(343 - 312) / 312] x 100
Subtract the new number by the original number
343 - 312 = 31
31 ÷ 312 = 0.09935897435897435
0.09935897435897435 x 100 = 9.94%