76.58% is the change from 521 to 920
Calculation steps:
[( 920 - 521 ) ÷ 521] x 100 = 76.58%
Formula
Percentage change = [(920 - 521) / 521] x 100
Subtract the new number by the original number
920 - 521 = 399
399 ÷ 521 = 0.7658349328214972
0.7658349328214972 x 100 = 76.58%