47.98% is the change from 521 to 771
Calculation steps:
[( 771 - 521 ) ÷ 521] x 100 = 47.98%
Formula
Percentage change = [(771 - 521) / 521] x 100
Subtract the new number by the original number
771 - 521 = 250
250 ÷ 521 = 0.4798464491362764
0.4798464491362764 x 100 = 47.98%