118.21% is the change from 390 to 851
Calculation steps:
[( 851 - 390 ) ÷ 390] x 100 = 118.21%
Formula
Percentage change = [(851 - 390) / 390] x 100
Subtract the new number by the original number
851 - 390 = 461
461 ÷ 390 = 1.182051282051282
1.182051282051282 x 100 = 118.21%