63.65% is the change from 520 to 851
Calculation steps:
[( 851 - 520 ) ÷ 520] x 100 = 63.65%
Formula
Percentage change = [(851 - 520) / 520] x 100
Subtract the new number by the original number
851 - 520 = 331
331 ÷ 520 = 0.6365384615384615
0.6365384615384615 x 100 = 63.65%