923.33% is the change from 30 to 307
Calculation steps:
[( 307 - 30 ) ÷ 30] x 100 = 923.33%
Formula
Percentage change = [(307 - 30) / 30] x 100
Subtract the new number by the original number
307 - 30 = 277
277 ÷ 30 = 9.233333333333333
9.233333333333333 x 100 = 923.33%