60.84% is the change from 521 to 838
Calculation steps:
[( 838 - 521 ) ÷ 521] x 100 = 60.84%
Formula
Percentage change = [(838 - 521) / 521] x 100
Subtract the new number by the original number
838 - 521 = 317
317 ÷ 521 = 0.6084452975047985
0.6084452975047985 x 100 = 60.84%