0.77% is the change from 521 to 525
Calculation steps:
[( 525 - 521 ) ÷ 521] x 100 = 0.77%
Formula
Percentage change = [(525 - 521) / 521] x 100
Subtract the new number by the original number
525 - 521 = 4
4 ÷ 521 = 0.007677543186180422
0.007677543186180422 x 100 = 0.77%