-80.5% is the change from 518 to 101
Calculation steps:
[( 101 - 518 ) ÷ 518] x 100 = -80.5%
Formula
Percentage change = [(101 - 518) / 518] x 100
Subtract the new number by the original number
101 - 518 = -417
-417 ÷ 518 = -0.805019305019305
-0.805019305019305 x 100 = -80.5%