-60.47% is the change from 86 to 34
Calculation steps:
[( 34 - 86 ) ÷ 86] x 100 = -60.47%
Formula
Percentage change = [(34 - 86) / 86] x 100
Subtract the new number by the original number
34 - 86 = -52
-52 ÷ 86 = -0.6046511627906976
-0.6046511627906976 x 100 = -60.47%