106.15% is the change from 309 to 637
Calculation steps:
[( 637 - 309 ) ÷ 309] x 100 = 106.15%
Formula
Percentage change = [(637 - 309) / 309] x 100
Subtract the new number by the original number
637 - 309 = 328
328 ÷ 309 = 1.0614886731391586
1.0614886731391586 x 100 = 106.15%