170.31% is the change from 64 to 173
Calculation steps:
[( 173 - 64 ) ÷ 64] x 100 = 170.31%
Formula
Percentage change = [(173 - 64) / 64] x 100
Subtract the new number by the original number
173 - 64 = 109
109 ÷ 64 = 1.703125
1.703125 x 100 = 170.31%