81.26% is the change from 539 to 977
Calculation steps:
[( 977 - 539 ) ÷ 539] x 100 = 81.26%
Formula
Percentage change = [(977 - 539) / 539] x 100
Subtract the new number by the original number
977 - 539 = 438
438 ÷ 539 = 0.8126159554730983
0.8126159554730983 x 100 = 81.26%