18.31% is the change from 71 to 84
Calculation steps:
[( 84 - 71 ) ÷ 71] x 100 = 18.31%
Formula
Percentage change = [(84 - 71) / 71] x 100
Subtract the new number by the original number
84 - 71 = 13
13 ÷ 71 = 0.18309859154929578
0.18309859154929578 x 100 = 18.31%