-88.51% is the change from 87 to 10
Calculation steps:
[( 10 - 87 ) ÷ 87] x 100 = -88.51%
Formula
Percentage change = [(10 - 87) / 87] x 100
Subtract the new number by the original number
10 - 87 = -77
-77 ÷ 87 = -0.8850574712643678
-0.8850574712643678 x 100 = -88.51%