37.13% is the change from 307 to 421
Calculation steps:
[( 421 - 307 ) ÷ 307] x 100 = 37.13%
Formula
Percentage change = [(421 - 307) / 307] x 100
Subtract the new number by the original number
421 - 307 = 114
114 ÷ 307 = 0.3713355048859935
0.3713355048859935 x 100 = 37.13%