214.89% is the change from 309 to 973
Calculation steps:
[( 973 - 309 ) ÷ 309] x 100 = 214.89%
Formula
Percentage change = [(973 - 309) / 309] x 100
Subtract the new number by the original number
973 - 309 = 664
664 ÷ 309 = 2.1488673139158574
2.1488673139158574 x 100 = 214.89%