40.77% is the change from 390 to 549
Calculation steps:
[( 549 - 390 ) ÷ 390] x 100 = 40.77%
Formula
Percentage change = [(549 - 390) / 390] x 100
Subtract the new number by the original number
549 - 390 = 159
159 ÷ 390 = 0.4076923076923077
0.4076923076923077 x 100 = 40.77%