70.31% is the change from 64 to 109
Calculation steps:
[( 109 - 64 ) ÷ 64] x 100 = 70.31%
Formula
Percentage change = [(109 - 64) / 64] x 100
Subtract the new number by the original number
109 - 64 = 45
45 ÷ 64 = 0.703125
0.703125 x 100 = 70.31%
Example