48.75% is the change from 521 to 775
Calculation steps:
[( 775 - 521 ) ÷ 521] x 100 = 48.75%
Formula
Percentage change = [(775 - 521) / 521] x 100
Subtract the new number by the original number
775 - 521 = 254
254 ÷ 521 = 0.4875239923224568
0.4875239923224568 x 100 = 48.75%