48.56% is the change from 521 to 774
Calculation steps:
[( 774 - 521 ) ÷ 521] x 100 = 48.56%
Formula
Percentage change = [(774 - 521) / 521] x 100
Subtract the new number by the original number
774 - 521 = 253
253 ÷ 521 = 0.4856046065259117
0.4856046065259117 x 100 = 48.56%