-86.13% is the change from 620 to 86
Calculation steps:
[( 86 - 620 ) ÷ 620] x 100 = -86.13%
Formula
Percentage change = [(86 - 620) / 620] x 100
Subtract the new number by the original number
86 - 620 = -534
-534 ÷ 620 = -0.8612903225806452
-0.8612903225806452 x 100 = -86.13%