147.25% is the change from 309 to 764
Calculation steps:
[( 764 - 309 ) ÷ 309] x 100 = 147.25%
Formula
Percentage change = [(764 - 309) / 309] x 100
Subtract the new number by the original number
764 - 309 = 455
455 ÷ 309 = 1.4724919093851132
1.4724919093851132 x 100 = 147.25%