91.73% is the change from 520 to 997
Calculation steps:
[( 997 - 520 ) ÷ 520] x 100 = 91.73%
Formula
Percentage change = [(997 - 520) / 520] x 100
Subtract the new number by the original number
997 - 520 = 477
477 ÷ 520 = 0.9173076923076923
0.9173076923076923 x 100 = 91.73%