42.79% is the change from 215 to 307
Calculation steps:
[( 307 - 215 ) ÷ 215] x 100 = 42.79%
Formula
Percentage change = [(307 - 215) / 215] x 100
Subtract the new number by the original number
307 - 215 = 92
92 ÷ 215 = 0.42790697674418604
0.42790697674418604 x 100 = 42.79%