304.25% is the change from 212 to 857
Calculation steps:
[( 857 - 212 ) ÷ 212] x 100 = 304.25%
Formula
Percentage change = [(857 - 212) / 212] x 100
Subtract the new number by the original number
857 - 212 = 645
645 ÷ 212 = 3.042452830188679
3.042452830188679 x 100 = 304.25%