68.18% is the change from 506 to 851
Calculation steps:
[( 851 - 506 ) ÷ 506] x 100 = 68.18%
Formula
Percentage change = [(851 - 506) / 506] x 100
Subtract the new number by the original number
851 - 506 = 345
345 ÷ 506 = 0.6818181818181818
0.6818181818181818 x 100 = 68.18%