49.26% is the change from 542 to 809
Calculation steps:
[( 809 - 542 ) ÷ 542] x 100 = 49.26%
Formula
Percentage change = [(809 - 542) / 542] x 100
Subtract the new number by the original number
809 - 542 = 267
267 ÷ 542 = 0.492619926199262
0.492619926199262 x 100 = 49.26%