-78.39% is the change from 509 to 110
Calculation steps:
[( 110 - 509 ) ÷ 509] x 100 = -78.39%
Formula
Percentage change = [(110 - 509) / 509] x 100
Subtract the new number by the original number
110 - 509 = -399
-399 ÷ 509 = -0.7838899803536346
-0.7838899803536346 x 100 = -78.39%