60.08% is the change from 521 to 834
Calculation steps:
[( 834 - 521 ) ÷ 521] x 100 = 60.08%
Formula
Percentage change = [(834 - 521) / 521] x 100
Subtract the new number by the original number
834 - 521 = 313
313 ÷ 521 = 0.6007677543186181
0.6007677543186181 x 100 = 60.08%