42.35% is the change from 366 to 521
Calculation steps:
[( 521 - 366 ) ÷ 366] x 100 = 42.35%
Formula
Percentage change = [(521 - 366) / 366] x 100
Subtract the new number by the original number
521 - 366 = 155
155 ÷ 366 = 0.42349726775956287
0.42349726775956287 x 100 = 42.35%