51.61% is the change from 31 to 47
Calculation steps:
[( 47 - 31 ) ÷ 31] x 100 = 51.61%
Formula
Percentage change = [(47 - 31) / 31] x 100
Subtract the new number by the original number
47 - 31 = 16
16 ÷ 31 = 0.5161290322580645
0.5161290322580645 x 100 = 51.61%