47.02% is the change from 521 to 766
Calculation steps:
[( 766 - 521 ) ÷ 521] x 100 = 47.02%
Formula
Percentage change = [(766 - 521) / 521] x 100
Subtract the new number by the original number
766 - 521 = 245
245 ÷ 521 = 0.47024952015355087
0.47024952015355087 x 100 = 47.02%