67.85% is the change from 507 to 851
Calculation steps:
[( 851 - 507 ) ÷ 507] x 100 = 67.85%
Formula
Percentage change = [(851 - 507) / 507] x 100
Subtract the new number by the original number
851 - 507 = 344
344 ÷ 507 = 0.6785009861932939
0.6785009861932939 x 100 = 67.85%