57.78% is the change from 45 to 71
Calculation steps:
[( 71 - 45 ) ÷ 45] x 100 = 57.78%
Formula
Percentage change = [(71 - 45) / 45] x 100
Subtract the new number by the original number
71 - 45 = 26
26 ÷ 45 = 0.5777777777777777
0.5777777777777777 x 100 = 57.78%