74.66% is the change from 521 to 910
Calculation steps:
[( 910 - 521 ) ÷ 521] x 100 = 74.66%
Formula
Percentage change = [(910 - 521) / 521] x 100
Subtract the new number by the original number
910 - 521 = 389
389 ÷ 521 = 0.746641074856046
0.746641074856046 x 100 = 74.66%