6.33% is the change from 490 to 521
Calculation steps:
[( 521 - 490 ) ÷ 490] x 100 = 6.33%
Formula
Percentage change = [(521 - 490) / 490] x 100
Subtract the new number by the original number
521 - 490 = 31
31 ÷ 490 = 0.06326530612244897
0.06326530612244897 x 100 = 6.33%