308.65% is the change from 208 to 850
Calculation steps:
[( 850 - 208 ) ÷ 208] x 100 = 308.65%
Formula
Percentage change = [(850 - 208) / 208] x 100
Subtract the new number by the original number
850 - 208 = 642
642 ÷ 208 = 3.0865384615384617
3.0865384615384617 x 100 = 308.65%