35.68% is the change from 384 to 521
Calculation steps:
[( 521 - 384 ) ÷ 384] x 100 = 35.68%
Formula
Percentage change = [(521 - 384) / 384] x 100
Subtract the new number by the original number
521 - 384 = 137
137 ÷ 384 = 0.3567708333333333
0.3567708333333333 x 100 = 35.68%