309.3% is the change from 215 to 880
Calculation steps:
[( 880 - 215 ) ÷ 215] x 100 = 309.3%
Formula
Percentage change = [(880 - 215) / 215] x 100
Subtract the new number by the original number
880 - 215 = 665
665 ÷ 215 = 3.0930232558139537
3.0930232558139537 x 100 = 309.3%