64.88% is the change from 521 to 859
Calculation steps:
[( 859 - 521 ) ÷ 521] x 100 = 64.88%
Formula
Percentage change = [(859 - 521) / 521] x 100
Subtract the new number by the original number
859 - 521 = 338
338 ÷ 521 = 0.6487523992322457
0.6487523992322457 x 100 = 64.88%