-78.57% is the change from 406 to 87
Calculation steps:
[( 87 - 406 ) ÷ 406] x 100 = -78.57%
Formula
Percentage change = [(87 - 406) / 406] x 100
Subtract the new number by the original number
87 - 406 = -319
-319 ÷ 406 = -0.7857142857142857
-0.7857142857142857 x 100 = -78.57%