43.95% is the change from 521 to 750
Calculation steps:
[( 750 - 521 ) ÷ 521] x 100 = 43.95%
Formula
Percentage change = [(750 - 521) / 521] x 100
Subtract the new number by the original number
750 - 521 = 229
229 ÷ 521 = 0.43953934740882916
0.43953934740882916 x 100 = 43.95%