313.51% is the change from 74 to 306
Calculation steps:
[( 306 - 74 ) ÷ 74] x 100 = 313.51%
Formula
Percentage change = [(306 - 74) / 74] x 100
Subtract the new number by the original number
306 - 74 = 232
232 ÷ 74 = 3.135135135135135
3.135135135135135 x 100 = 313.51%