72.94% is the change from 521 to 901
Calculation steps:
[( 901 - 521 ) ÷ 521] x 100 = 72.94%
Formula
Percentage change = [(901 - 521) / 521] x 100
Subtract the new number by the original number
901 - 521 = 380
380 ÷ 521 = 0.7293666026871402
0.7293666026871402 x 100 = 72.94%