0.77% is the change from 517 to 521
Calculation steps:
[( 521 - 517 ) ÷ 517] x 100 = 0.77%
Formula
Percentage change = [(521 - 517) / 517] x 100
Subtract the new number by the original number
521 - 517 = 4
4 ÷ 517 = 0.007736943907156673
0.007736943907156673 x 100 = 0.77%