217.15% is the change from 309 to 980
Calculation steps:
[( 980 - 309 ) ÷ 309] x 100 = 217.15%
Formula
Percentage change = [(980 - 309) / 309] x 100
Subtract the new number by the original number
980 - 309 = 671
671 ÷ 309 = 2.1715210355987056
2.1715210355987056 x 100 = 217.15%