63.92% is the change from 521 to 854
Calculation steps:
[( 854 - 521 ) ÷ 521] x 100 = 63.92%
Formula
Percentage change = [(854 - 521) / 521] x 100
Subtract the new number by the original number
854 - 521 = 333
333 ÷ 521 = 0.6391554702495201
0.6391554702495201 x 100 = 63.92%