90.02% is the change from 521 to 990
Calculation steps:
[( 990 - 521 ) ÷ 521] x 100 = 90.02%
Formula
Percentage change = [(990 - 521) / 521] x 100
Subtract the new number by the original number
990 - 521 = 469
469 ÷ 521 = 0.9001919385796545
0.9001919385796545 x 100 = 90.02%