77.78% is the change from 81 to 144
Calculation steps:
[( 144 - 81 ) ÷ 81] x 100 = 77.78%
Formula
Percentage change = [(144 - 81) / 81] x 100
Subtract the new number by the original number
144 - 81 = 63
63 ÷ 81 = 0.7777777777777778
0.7777777777777778 x 100 = 77.78%