36.36% is the change from 308 to 420
Calculation steps:
[( 420 - 308 ) ÷ 308] x 100 = 36.36%
Formula
Percentage change = [(420 - 308) / 308] x 100
Subtract the new number by the original number
420 - 308 = 112
112 ÷ 308 = 0.36363636363636365
0.36363636363636365 x 100 = 36.36%