78.71% is the change from 310 to 554
Calculation steps:
[( 554 - 310 ) ÷ 310] x 100 = 78.71%
Formula
Percentage change = [(554 - 310) / 310] x 100
Subtract the new number by the original number
554 - 310 = 244
244 ÷ 310 = 0.7870967741935484
0.7870967741935484 x 100 = 78.71%