31.28% is the change from 243 to 319
Calculation steps:
[( 319 - 243 ) ÷ 243] x 100 = 31.28%
Formula
Percentage change = [(319 - 243) / 243] x 100
Subtract the new number by the original number
319 - 243 = 76
76 ÷ 243 = 0.31275720164609055
0.31275720164609055 x 100 = 31.28%