68.85% is the change from 504 to 851
Calculation steps:
[( 851 - 504 ) ÷ 504] x 100 = 68.85%
Formula
Percentage change = [(851 - 504) / 504] x 100
Subtract the new number by the original number
851 - 504 = 347
347 ÷ 504 = 0.6884920634920635
0.6884920634920635 x 100 = 68.85%