40.05% is the change from 392 to 549
Calculation steps:
[( 549 - 392 ) ÷ 392] x 100 = 40.05%
Formula
Percentage change = [(549 - 392) / 392] x 100
Subtract the new number by the original number
549 - 392 = 157
157 ÷ 392 = 0.4005102040816326
0.4005102040816326 x 100 = 40.05%