122.33% is the change from 309 to 687
Calculation steps:
[( 687 - 309 ) ÷ 309] x 100 = 122.33%
Formula
Percentage change = [(687 - 309) / 309] x 100
Subtract the new number by the original number
687 - 309 = 378
378 ÷ 309 = 1.2233009708737863
1.2233009708737863 x 100 = 122.33%