144.66% is the change from 309 to 756
Calculation steps:
[( 756 - 309 ) ÷ 309] x 100 = 144.66%
Formula
Percentage change = [(756 - 309) / 309] x 100
Subtract the new number by the original number
756 - 309 = 447
447 ÷ 309 = 1.4466019417475728
1.4466019417475728 x 100 = 144.66%