410.78% is the change from 102 to 521
Calculation steps:
[( 521 - 102 ) ÷ 102] x 100 = 410.78%
Formula
Percentage change = [(521 - 102) / 102] x 100
Subtract the new number by the original number
521 - 102 = 419
419 ÷ 102 = 4.107843137254902
4.107843137254902 x 100 = 410.78%