174.19% is the change from 310 to 850
Calculation steps:
[( 850 - 310 ) ÷ 310] x 100 = 174.19%
Formula
Percentage change = [(850 - 310) / 310] x 100
Subtract the new number by the original number
850 - 310 = 540
540 ÷ 310 = 1.7419354838709677
1.7419354838709677 x 100 = 174.19%