309.33% is the change from 75 to 307
Calculation steps:
[( 307 - 75 ) ÷ 75] x 100 = 309.33%
Formula
Percentage change = [(307 - 75) / 75] x 100
Subtract the new number by the original number
307 - 75 = 232
232 ÷ 75 = 3.0933333333333333
3.0933333333333333 x 100 = 309.33%