-86.15% is the change from 621 to 86
Calculation steps:
[( 86 - 621 ) ÷ 621] x 100 = -86.15%
Formula
Percentage change = [(86 - 621) / 621] x 100
Subtract the new number by the original number
86 - 621 = -535
-535 ÷ 621 = -0.8615136876006442
-0.8615136876006442 x 100 = -86.15%