76.39% is the change from 521 to 919
Calculation steps:
[( 919 - 521 ) ÷ 521] x 100 = 76.39%
Formula
Percentage change = [(919 - 521) / 521] x 100
Subtract the new number by the original number
919 - 521 = 398
398 ÷ 521 = 0.763915547024952
0.763915547024952 x 100 = 76.39%