53.09% is the change from 81 to 124
Calculation steps:
[( 124 - 81 ) ÷ 81] x 100 = 53.09%
Formula
Percentage change = [(124 - 81) / 81] x 100
Subtract the new number by the original number
124 - 81 = 43
43 ÷ 81 = 0.5308641975308642
0.5308641975308642 x 100 = 53.09%