50.1% is the change from 521 to 782
Calculation steps:
[( 782 - 521 ) ÷ 521] x 100 = 50.1%
Formula
Percentage change = [(782 - 521) / 521] x 100
Subtract the new number by the original number
782 - 521 = 261
261 ÷ 521 = 0.5009596928982726
0.5009596928982726 x 100 = 50.1%