72.34% is the change from 47 to 81
Calculation steps:
[( 81 - 47 ) ÷ 47] x 100 = 72.34%
Formula
Percentage change = [(81 - 47) / 47] x 100
Subtract the new number by the original number
81 - 47 = 34
34 ÷ 47 = 0.723404255319149
0.723404255319149 x 100 = 72.34%