-84.97% is the change from 519 to 78
Calculation steps:
[( 78 - 519 ) ÷ 519] x 100 = -84.97%
Formula
Percentage change = [(78 - 519) / 519] x 100
Subtract the new number by the original number
78 - 519 = -441
-441 ÷ 519 = -0.8497109826589595
-0.8497109826589595 x 100 = -84.97%