68.6% is the change from 86 to 145
Calculation steps:
[( 145 - 86 ) ÷ 86] x 100 = 68.6%
Formula
Percentage change = [(145 - 86) / 86] x 100
Subtract the new number by the original number
145 - 86 = 59
59 ÷ 86 = 0.686046511627907
0.686046511627907 x 100 = 68.6%