63.93% is the change from 61 to 100
Calculation steps:
[( 100 - 61 ) ÷ 61] x 100 = 63.93%
Formula
Percentage change = [(100 - 61) / 61] x 100
Subtract the new number by the original number
100 - 61 = 39
39 ÷ 61 = 0.639344262295082
0.639344262295082 x 100 = 63.93%