135.88% is the change from 131 to 309
Calculation steps:
[( 309 - 131 ) ÷ 131] x 100 = 135.88%
Formula
Percentage change = [(309 - 131) / 131] x 100
Subtract the new number by the original number
309 - 131 = 178
178 ÷ 131 = 1.3587786259541985
1.3587786259541985 x 100 = 135.88%