42.59% is the change from 540 to 770
Calculation steps:
[( 770 - 540 ) ÷ 540] x 100 = 42.59%
Formula
Percentage change = [(770 - 540) / 540] x 100
Subtract the new number by the original number
770 - 540 = 230
230 ÷ 540 = 0.42592592592592593
0.42592592592592593 x 100 = 42.59%