328.37% is the change from 215 to 921
Calculation steps:
[( 921 - 215 ) ÷ 215] x 100 = 328.37%
Formula
Percentage change = [(921 - 215) / 215] x 100
Subtract the new number by the original number
921 - 215 = 706
706 ÷ 215 = 3.2837209302325583
3.2837209302325583 x 100 = 328.37%