138.71% is the change from 310 to 740
Calculation steps:
[( 740 - 310 ) ÷ 310] x 100 = 138.71%
Formula
Percentage change = [(740 - 310) / 310] x 100
Subtract the new number by the original number
740 - 310 = 430
430 ÷ 310 = 1.3870967741935485
1.3870967741935485 x 100 = 138.71%