-86.43% is the change from 619 to 84
Calculation steps:
[( 84 - 619 ) ÷ 619] x 100 = -86.43%
Formula
Percentage change = [(84 - 619) / 619] x 100
Subtract the new number by the original number
84 - 619 = -535
-535 ÷ 619 = -0.864297253634895
-0.864297253634895 x 100 = -86.43%