-86.71% is the change from 647 to 86
Calculation steps:
[( 86 - 647 ) ÷ 647] x 100 = -86.71%
Formula
Percentage change = [(86 - 647) / 647] x 100
Subtract the new number by the original number
86 - 647 = -561
-561 ÷ 647 = -0.8670788253477589
-0.8670788253477589 x 100 = -86.71%