1.96% is the change from 511 to 521
Calculation steps:
[( 521 - 511 ) ÷ 511] x 100 = 1.96%
Formula
Percentage change = [(521 - 511) / 511] x 100
Subtract the new number by the original number
521 - 511 = 10
10 ÷ 511 = 0.019569471624266144
0.019569471624266144 x 100 = 1.96%